- discuss - lists.mariadb.org

[Maria-discuss] Bill Owens: Get Andrew Yang on 60 Minutes
by carlosla1987＠gmail.com 30 Apr '19

30 Apr '19

Hola. Acabo de firmar la petición "Bill Owens: Get Andrew Yang on 60 Minutes" y pensé que te podría interesar. Estamos intentando conseguir 7.500 firmas y necesitamos todo el apoyo que podamos conseguir. Puedes leer más y firmar la petición aquí: http://chng.it/fXhkx89bFX ¡Gracias! Carlos

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[Maria-discuss] Migration question - advice sought
by Richard Reina 28 Apr '19

28 Apr '19

I have about five MySQL slaves backing up a MySQL master. The master is rather old and I am planning on migrating to MariaDB. I was hoping I could I create a MariaDB slave that backs up the newest MySQL slave (making it a relay) and then make the Maria slave a master and add Maria slaves until MySQL is phased out. Does this sound like a good plan or would it be better to just create a new Maria Master with dumps and add Maria slaves to it? Thanks

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[Maria-discuss] Understanding access to data through a unique index (r_rows=NULL in ANALYZE)
by Barrendeitor 25 Apr '19

25 Apr '19

Hello, I'm using MariaDB 13.3.14 I have a very simple test table with an email column and I am using |ANALYZE|to see the behavior of the indexes. If I understand correctly the output of |ANALYZE|, '|rows'|indicates the estimate of records accessed in the table, and |'r_rows'|the actual number of accesses. (Am I correct?) If yes, the issue is that, for a query as simple as: | SELECT*FROMuserWHEREemail ='user(a)domain.com'| ||| -- user(a)domain.com exists in email column and it is unique| || If I create a normal index in the |'email'|field, |r_rows=|1. However, if I create a unique index, |r_rows|=|NULL|. If I understand correctly, a NULL value on 'r_rows' means that no access to data has been performed ( https://mariadb.com/kb/en/library/analyze-statement/ ). So my question is, if I have a valid result, how can it be that the table is not accessed? How is the data retrieved when a unique index is used? Here is my output (I remember that the email in the query exists): MariaDB [test2]> create index email on usuario(email); Query OK, 95236 rows affected (0.451 sec) Records: 95236 Duplicates: 0 Warnings: 0 MariaDB [test2]> analyze select * from usuario where email = 'nec.urna.et(a)volutpatornare.com'; +------+-------------+---------+------+---------------+-------+---------+-------+------+--------+----------+------------+-----------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | r_rows | filtered | r_filtered | Extra | +------+-------------+---------+------+---------------+-------+---------+-------+------+--------+----------+------------+-----------------------+ | 1 | SIMPLE | usuario | ref | email | email | 302 | const | 1 | 1.00 | 100.00 | 100.00 | Using index condition | +------+-------------+---------+------+---------------+-------+---------+-------+------+--------+----------+------------+-----------------------+ 1 row in set (0.001 sec) MariaDB [test2]> drop index email on usuario; Query OK, 95236 rows affected (0.237 sec) Records: 95236 Duplicates: 0 Warnings: 0 MariaDB [test2]> create unique index email on usuario(email); Query OK, 95236 rows affected (0.484 sec) Records: 95236 Duplicates: 0 Warnings: 0 MariaDB [test2]> analyze select * from usuario where email = 'nec.urna.et(a)volutpatornare.com'; +------+-------------+---------+-------+---------------+-------+---------+-------+------+--------+----------+------------+-------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | r_rows | filtered | r_filtered | Extra | +------+-------------+---------+-------+---------------+-------+---------+-------+------+--------+----------+------------+-------+ | 1 | SIMPLE | usuario | const | email | email | 302 | const | 1 | NULL | 100.00 | NULL | | +------+-------------+---------+-------+---------------+-------+---------+-------+------+--------+----------+------------+-------+ 1 row in set (0.001 sec) Regards. ||

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[Maria-discuss] gtid and current_pos vs slave_pos
by mariadb＠Biblestuph.com 24 Apr '19

24 Apr '19

I have four servers all running 10.3 as follows: A <=> B => C => D where server_ids are: A => 301 B => 302 C => 303 D => 304 I.E., A is a master to B, B is a master to A, B is also a master to C, and C is a master to D. In addition to their actual replicating DBs, all four servers also have a "norep" DB that is used to create temporary tables for local report processing (as well as any other possible writes we might want to make locally without affecting the slave chain). Historically we've prevented replication for the norep DB via: replicate_ignore_db = mysql,norep replicate_wild_ignore_table = mysql.%,norep.% Which is set as such on all four servers (the replicate_do and binlog_do/ignore flavor of filters are all unset). Writes to the A and B servers are programmatically controlled such that only one of the two servers will accept writes at any given moment. Server D writes binlogs for potential backup/disaster recovery, but has no attached slave. All that in mind, looking at the binary logs on D, I see this statement: # at 51363132 #190423 9:07:51 server id 302 end_log_pos 51363170 GTID 1-302-47886064 ddl /*!100001 SET @@session.server_id=302*//*!*/; /*!100001 SET @@session.gtid_seq_no=47886064*//*!*/; # at 51363170 #190423 9:07:51 server id 302 end_log_pos 51363324 Query thread_id=345449 exec_time=1800 error_code=0 SET TIMESTAMP=1556024871/*!*/; SET @@session.pseudo_thread_id=345449/*!*/; DROP TEMPORARY TABLE IF EXISTS `norep`.`locations` /* generated by server */ /*!*/; How is it that that statement made it all the way through to server D from B? Shouldn't it have been filtered out by server C? Next, I'm reading up on gtid-based replication with the thought that I would love to be able to do things like bring down C for maintenance and temporarily point D to B. I read the docs here: https://mariadb.com/kb/en/library/gtid/ however, in looking at the actual binary logs of the servers they don't seem to reflect the explanations that I read there especially in regards to gtid_current_pos vs. gtid_slave_pos. Specifically, when I look at the gtid_slave_pos on server D, which I thought was only supposed to reflect transactions that were actually replicated, I sometimes see statements coming from server C; these are temporary tables being written into norep on C. They are not actually replicating on D (at least as far as I can tell), and they don't show up D's binary log. So why would they be reflected in D's gtid_slave_pos? For example, just a moment ago SELECT @@GLOBAL.gtid_slave_pos on D showed this: 1-303-48758339 This transaction does not appear in D's binlog, which I would expect since it should not in fact actually be replicated. But because it is reflected in gtid_slave_pos, it seems to me that in my setup I cannot reliably use gtid_current_pos or gtid_slave_pos, since either may at any given time point to an entry on C that of course won't exist on B should I ever want to redirect D to B. Am I missing or mis-understanding something here? Cheers, Dan

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[Maria-discuss] How do I determine if versions of phpMyAdmin before 4.8.5 is SQL Injectable using sqlmap?
by Turritopsis Dohrnii Teo En Ming 17 Apr '19

17 Apr '19

Subject/Topic: How do I determine if versions of phpMyAdmin before 4.8.5 is SQL Injectable using sqlmap? Good evening from Singapore, Our customer (company name is Confidential/not disclosed) reported that their MySQL database has been found missing or was deleted a few times. They are using Ubuntu 16.04 LTS Linux server with Apache2 Web Server, MySQL and PHP (LAMP). We responded to these security incidents by changing the passwords of the regular user, root user, and MySQL database user root. We have also examined /var/log/auth.log and think that the hacker could not have come in through ssh or sftp over ssh. From /var/log/mysql/error.log, we can ascertain that the MySQL database has been deleted at certain timings. We have also found nothing abnormal after examining /var/log/apache2/access.log. Even though we have secured the Ubuntu Linux server by changing passwords, the hacker was still able to delete our customer's MySQL database again and again. I have already proposed to install ModSecurity Open Source Web Application Firewall (WAF) to defend against web application attacks but my boss has told me to put that on hold at the moment. In fact, I have already deployed ModSecurity 2.9.0 on a Ubuntu 16.04 LTS *Testing* server and found that it actively detects and logs Nessus and sqlmap vulnerability scans in blocking mode. Since we did not find any evidence that the hacker had breached our customer's Ubuntu 16.04 LTS production server through ssh or Teamviewer, we suspect that the hacker could have achieved it by SQL injection. I took the initiative of downloading and installing Nessus Professional 8.3.1 Trial version for Windows 64-bit. The vulnerability scan report generated by Nessus Web Application Tests shows that our customer is using a version of phpMyAdmin prior to 4.8.5 which could be vulnerable to SQL injection using the designer feature. Further research shows that I can use sqlmap to determine if phpMyAdmin is SQL injectable. I already have a Testing Ubuntu 16.04 LTS Linux server with a Testing MySQL database and a Testing phpMyAdmin 4.8.4. I have purposely installed phpMyAdmin 4.8.4 because this version was reported to be vulnerable to SQL injection using the designer feature, and our customer is using a vulnerable version, according to CVE-2019-6798 ( https://nvd.nist.gov/vuln/detail/CVE-2019-6798 ). Then I proceeded to download and execute sqlmap on our Ubuntu Linux desktop against our Testing server. No matter how many commands I try, sqlmap always report that phpMyAdmin 4.8.4 is *NOT* SQL injectable. Perhaps I was using the wrong sqlmap commands all the time? The following is one of the many sqlmap commands I have used. $ python sqlmap.py -u "https://www.EXAMPLE.com/phymyadmin/index.php?id=1" --level=1 --dbms=mysql --sql-query="drop database" Replace database by database name. May I know what is the correct sqlmap command that I should use to determine that my Testing phpMyAdmin 4.8.4 is SQL injectable? I would like to know if I can successfully drop/delete the Testing database on our Testing server. If I can successfully drop/delete the Testing MySQL database using sqlmap, I would be able to conclude that the hacker must have carried out SQL injection to drop/delete the customer's database. I have already turned off the Testing ModSecurity Web Application Firewall on our Testing server to allow sqlmap to go through. Please point me to any good tutorial on SQL injection using sqlmap. Maybe I do not understand SQL injection well enough. Our customer is also using a customised in-house inventory management system that relies on PHP application and MySQL database. Would open source Snort Intrusion Detection System (IDS) and Intrusion Prevention System (IPS) be able to detect and block SQL injection as well? Please advise. Thank you very much. -----BEGIN EMAIL SIGNATURE----- The Gospel for all Targeted Individuals (TIs): [The New York Times] Microwave Weapons Are Prime Suspect in Ills of U.S. Embassy Workers Link: https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html ******************************************************************************************** Singaporean Mr. Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 14 Feb 2019 [1] https://tdtemcerts.wordpress.com/ [2] https://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming -----END EMAIL SIGNATURE-----

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[Maria-discuss] Strange timestamp index behaviour / bug
by Reinis Rozitis 03 Apr '19

03 Apr '19

Hello, before reporting it as bug I wanted to understand what's really going on or how to investigate it further: Because of the DST changes we experienced a strange issue where afterwards a query suddenly wouldn't use an index on a timestamp column anymore and would do a full tablescan and because of the table size literally brought down the db. The table itself is more complex but I could simplify it down to: CREATE TABLE `tmp` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `ts` timestamp NOT NULL DEFAULT current_timestamp(), PRIMARY KEY (`id`), KEY `ts_2` (`ts`) ) ENGINE=InnoDB CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; (the original table is TokuDB but the same behavior happens also on InnoDB / Server Mariadb 10.3.13): And the issue is: MariaDB [db]> explain select * from tmp where `ts` > '2019-03-31 03:00:00'; +------+-------------+-------+-------+---------------+------+---------+------+------+--------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+-------+-------+---------------+------+---------+------+------+--------------------------+ | 1 | SIMPLE | tmp | index | ts_2 | ts_2 | 4 | NULL | 1000 | Using where; Using index | +------+-------------+-------+-------+---------------+------+---------+------+------+--------------------------+ While actually: MariaDB [db]> select count(*) from tmp where `ts` > '2019-03-31 03:00:00'; +----------+ | count(*) | +----------+ | 175 | +----------+ So either the sql optimizer or the engine does something strange. While for example: MariaDB [db]> explain select * from tmp where `ts` > '2019-03-31 04:00:00'; +------+-------------+-------+-------+---------------+------+---------+------+------+--------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+-------+-------+---------------+------+---------+------+------+--------------------------+ | 1 | SIMPLE | tmp | range | ts_2 | ts_2 | 4 | NULL | 175 | Using where; Using index | +------+-------------+-------+-------+---------------+------+---------+------+------+--------------------------+ .. works as expected. The data is basically (just missing the 3:xx because of the clock spin): | 35458195 | 2019-03-31 02:55:44 | | 35458196 | 2019-03-31 02:55:45 | | 35458197 | 2019-03-31 02:56:37 | | 35458198 | 2019-03-31 02:59:16 | | 35458199 | 2019-03-31 02:59:39 | | 35458200 | 2019-03-31 04:01:42 | | 35458201 | 2019-03-31 04:02:59 | | 35458202 | 2019-03-31 04:04:02 | | 35458203 | 2019-03-31 04:04:26 | | 35458204 | 2019-03-31 04:04:38 | In the Innodb case the explain while showing that it will return all rows (the test table has 1000) also showing that it will use the 'ts_2' index on the original tokudb table it won't use the index even forced: MariaDB [db]> explain select * from twitt_ext_posts_url where `ts` > '2019-03-31 04:00:00'; +------+-------------+---------------------+-------+---------------+------+---------+------+-------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+---------------------+-------+---------------+------+---------+------+-------+-------------+ | 1 | SIMPLE | twitt_ext_posts_url | range | ts_2 | ts_2 | 4 | NULL | 42444 | Using where | +------+-------------+---------------------+-------+---------------+------+---------+------+-------+-------------+ .. works again fine, but: MariaDB [db]> explain select * from twitt_ext_posts_url where `ts` > '2019-03-31 03:00:00'; +------+-------------+---------------------+------+---------------+------+---------+------+----------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+---------------------+------+---------------+------+---------+------+----------+-------------+ | 1 | SIMPLE | twitt_ext_posts_url | ALL | ts_2 | NULL | NULL | NULL | 28547845 | Using where | +------+-------------+---------------------+------+---------------+------+---------+------+----------+-------------+ MariaDB [db]> explain select * from twitt_ext_posts_url force index(ts_2) where `ts` > '2019-03-31 03:00:00'; +------+-------------+---------------------+------+---------------+------+---------+------+----------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+---------------------+------+---------------+------+---------+------+----------+-------------+ | 1 | SIMPLE | twitt_ext_posts_url | ALL | ts_2 | NULL | NULL | NULL | 28547872 | Using where | +------+-------------+---------------------+------+---------------+------+---------+------+----------+-------------+ Is this to be expected or a bug? Should a gap in index values drop the index use for range queries? Is there anything else I need to add to the report? rr

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[Maria-discuss] required mysql_upgrade; MDEV-14637
by Michal Schorm 03 Apr '19

03 Apr '19

Hello, I have a questions regarding the warnings showing up at 10.2 and 10.3 releases: When upgrading from MariaDB 10.2.16 or earlier to MariaDB 10.2.17 or higher, running mysql_upgrade is required due to changes introduced in MDEV-14637. When upgrading from MariaDB 10.3.8 or earlier to MariaDB 10.3.9 or higher, running mysql_upgrade is required due to changes introduced in MDEV-14637. -- 1) The same applies for upgrading <=10.2.16 to >= 10.3.9, right? 2) Does it mean, it is impossible to use "dump and restore" technique, or it only means I need to run the mysql_upgrade afterwards? 3) The problem is not triggered when upgrading from 5.5, 10.0 and 10.1? 4) The problem is not triggered when upgrading to 10.4 ? -- Michal Schorm Software Engineer Core Services - Databases Team Red Hat --

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[Maria-discuss] Row vs Statement Replication in 10.3
by mariadb＠biblestuph.com 02 Apr '19

02 Apr '19

Using binlog-format=MIXED I'm trying to get my head around why certain statements are being written as RBR instead of as a statement. On my 10.3 test server running a fraction of my full load binary logs are getting written to the tune of about 30M/minute (the 5.5 production server with a currently much heavier load writes about 8.5M/minute). All of the tables are currently MyISAM. Here's a couple examples: This always gets written as a statement in 10.3: UPDATE mydb.t1 SET rundate = '2019-03-28 23:04:00' , runtime = UTC_TIMESTAMP() , runstatus = 1 WHERE hostname = 'my.host.com' While this always gets written as a row: UPDATE mydb.t1 SET rundate = '2019-03-28 23:04:00' , runtime = UTC_TIMESTAMP() , runstatus = 10 WHERE hostname = 'my.host.com' If it matters, runstatus (the only difference in the two) is a TINYINT(3) UNSIGNED NOT NULL DEFAULT 0. Both statements are written as statements in 5.5. And this one always gets written as RBR on 10.3, but I don't see why. I reviewed the information at https://mariadb.com/kb/en/library/unsafe-statements-for-statement-based-rep… but can't seem to see what is triggering it. UPDATE mydb.t1 AS i LEFT JOIN mydb.t2 AS j1 ON ( i.f1 = j1.f1 ) LEFT JOIN mydb.t3 AS j2 ON ( i.f1 = j2.f1 AND i.f2 > 0 AND i.f2 = j2.f2 ) SET i.f3 = IF ( i.f2 < 0, IF ( j1.f3 IS NULL, i.f3, j1.f3 ), IF ( j2.f3 IS NULL, i.f3, j2.f3 ) ) , i.f4 = IF ( i.f2 < 0, IF ( j1.f3 IS NULL, i.f4, j1.f3 ), IF ( j2.f3 IS NULL, i.f4, j2.f3 ) ) WHERE i.f5 != 0 AND i.f2 != 0 AND i.f6 = 1 AND i.f7 = 0 The 10.3 logs don't offer anything by way of explanation, presumably because I have it set to MIXED. Looking at it I see I can use a COALESCE instead of the inner IFs, but I'm still unclear why it must be row-based. Thanks, Dan

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[Maria-discuss] install plugin “if not installed”?
by Felipe Gasper 29 Mar '19

29 Mar '19

Hello, Is there any way to install a plugin via SQL but to trap the error that comes up if the plugin is already installed? I’d like to do it without creating a “throwaway” procedure, if that’s possible. Thank you! -Felipe Gasper Mississauga, Ontario

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[Maria-discuss] auth_socket.so on upgrade 5.7 -> 10.2
by Felipe Gasper 29 Mar '19

29 Mar '19

Hello, Is mysql_upgrade meant to facilitate a migration from auth_socket.so to MariaDB’s unix_socket.so? I just tried to upgrade 5.7 to 10.2 and found root@localhost (which was set up to use MySQL auth_socket.so) was no longer able to connect because “ERROR 1524 (HY000): Plugin 'auth_socket' is not loaded”. -FG

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[Maria-discuss] question on how to get test working on Windows for mariadb server....
by Luuk 28 Mar '19

28 Mar '19

After noticing that a bug i reported was set to 'solved' i wanted to see/check that. So, i downloaded/compiled Now i seem to be able to run the server, but i am unable to connect using 'mysql.exe' Luuk@ZES MINGW64 /d/TEMP/server (master) $ bld/client/RelWithDebInfo/mysqladmin -h localhost -u root version D:\TEMP\server\bld\client\RelWithDebInfo\mysqladmin.exe Ver 9.1 Distrib 10.4.4-MariaDB, for Win32 on AMD64 Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Server version 10.4.4-MariaDB Protocol version 10 Connection localhost via TCP/IP TCP port 3306 Uptime: 23 min 15 sec Threads: 7 Questions: 4 Slow queries: 0 Opens: 16 Flush tables: 1 Open tables: 10 Queries per second avg: 0.002 Luuk@ZES MINGW64 /d/TEMP/server (master) $ bld/client/RelWithDebInfo/mysql -h localhost -u root #### no reaction, killin 'mysql.exe' just add another 'Aborted connection' to the server-log.... QUESTION: What am i missing here? The log from the server (Windows 10): Luuk@ZES MINGW64 /d/TEMP/server/bld (master) $ sql/RelWithDebInfo/mysqld.exe --console 2019-03-24 16:20:01 0 [Note] D:\TEMP\server\bld\sql\RelWithDebInfo\mysqld.exe (mysqld 10.4.4-MariaDB) starting as process 2024 ... 2019-03-24 16:20:01 0 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions 2019-03-24 16:20:01 0 [Note] InnoDB: Uses event mutexes 2019-03-24 16:20:01 0 [Note] InnoDB: Compressed tables use zlib 1.2.11 2019-03-24 16:20:01 0 [Note] InnoDB: Number of pools: 1 2019-03-24 16:20:01 0 [Note] InnoDB: Using SSE2 crc32 instructions 2019-03-24 16:20:01 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M 2019-03-24 16:20:01 0 [Note] InnoDB: Completed initialization of buffer pool 2019-03-24 16:20:01 0 [Note] InnoDB: 128 out of 128 rollback segments are active. 2019-03-24 16:20:01 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2019-03-24 16:20:01 0 [Note] InnoDB: Setting file '.\ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2019-03-24 16:20:01 0 [Note] InnoDB: File '.\ibtmp1' size is now 12 MB. 2019-03-24 16:20:01 0 [Note] InnoDB: Waiting for purge to start 2019-03-24 16:20:01 0 [Note] InnoDB: 10.4.4 started; log sequence number 139881; transaction id 21 2019-03-24 16:20:01 0 [Note] InnoDB: Loading buffer pool(s) from D:\TEMP\server\bld\sql\data\ib_buffer_pool 2019-03-24 16:20:01 0 [Note] Plugin 'FEEDBACK' is disabled. 2019-03-24 16:20:01 0 [Note] InnoDB: Buffer pool(s) load completed at 190324 16:20:01 2019-03-24 16:20:01 0 [Note] Server socket created on IP: '::'. 2019-03-24 16:20:01 0 [Note] Reading of all Master_info entries succeded 2019-03-24 16:20:01 0 [Note] Added new Master_info '' to hash table 2019-03-24 16:20:01 0 [Note] D:\TEMP\server\bld\sql\RelWithDebInfo\mysqld.exe: ready for connections. Version: '10.4.4-MariaDB' socket: '' port: 3306 Source distribution 2019-03-24 16:21:24 8 [Warning] Aborted connection 8 to db: 'unconnected' user: 'root' host: 'localhost' (Got an error reading communication packets) 2019-03-24 16:21:49 9 [Warning] Aborted connection 9 to db: 'unconnected' user: 'root' host: 'localhost' (Got an error reading communication packets)

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[Maria-discuss] Why does local root need a password?
by Felipe Gasper 27 Mar '19

27 Mar '19

Hello, I’ve submitted a proposal to the MySQL team to allow the system administrator, when logging in via a local socket that indicates reliably that the DB client is the superuser (e.g., SO_PEERCRED in Linux), to not need a password. As implemented, my suggestion allows root to log in as any user. The rationale is that the system administrator can do anything on the server (including manual edits to the DB files) anyway; thus, every user already implicitly trusts that user with their data. This will simplify DB administration on several levels, but most conspicuously because a lost DB admin password will no longer necessitate the awkward one-time-init-file recovery method. Would MariaDB be interested in this proposal? -FG

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Re: [Maria-discuss] [MariaDB Announce] MariaDB 10.2.23 and MariaDB Connector/J 2.4.1 now available
by Reindl Harald 25 Mar '19

25 Mar '19

congratulations, again a point update which just don't compile frankly what about RC announcements so that idiots like me building packages from source can point out such issues *before* official announcements? [ 92%] Building CXX object sql/CMakeFiles/sql.dir/sql_plugin.cc.o [ 92%] Building CXX object sql/CMakeFiles/sql.dir/sql_prepare.cc.o [ 92%] Building CXX object sql/CMakeFiles/sql.dir/sql_rename.cc.o /home/builduser/rpmbuild/BUILD/mariadb-10.2.23/sql/sql_parse.cc: In function 'int mysql_execute_command(THD*)': /home/builduser/rpmbuild/BUILD/mariadb-10.2.23/sql/sql_parse.cc:3515:16: error: 'class THD' has no member named 'profiling' thd->profiling.discard_current_query(); cmake . \ -DFEATURE_SET="large" \ -DCMAKE_INSTALL_PREFIX="%{_prefix}" \ -DINSTALL_INCLUDEDIR=include/mysql \ -DINSTALL_LAYOUT=RPM \ -DDAEMON_NAME="mysqld" \ -DDAEMON_NO_PREFIX="mysqld" \ -DNICE_PROJECT_NAME="MariaDB" \ -DINSTALL_LIBDIR="%{_lib}/mysql" \ -DINSTALL_MANDIR=share/man \ -DINSTALL_MYSQLSHAREDIR=share/mysql \ -DINSTALL_MYSQLTESTDIR=share/mysql-test \ -DINSTALL_PLUGINDIR="%{_lib}/mysql/plugin" \ -DINSTALL_SBINDIR=libexec \ -DINSTALL_SCRIPTDIR=bin \ -DINSTALL_SQLBENCHDIR= \ -DINSTALL_SUPPORTFILESDIR=share/mysql \ -DMYSQL_DATADIR="%{_sharedstatedir}/mysql" \ -DMYSQL_UNIX_ADDR="%{_sharedstatedir}/mysql/mysql.sock" \ -DENABLED_PROFILING=OFF \ -DENABLE_DEBUG_SYNC=OFF \ -DENABLE_DTRACE=OFF \ -DPLUGIN_ARIA=YES \ -DPLUGIN_CSV=YES \ -DPLUGIN_MYISAM=YES \ -DPLUGIN_ARCHIVE=NO \ -DPLUGIN_BLACKHOLE=NO \ -DPLUGIN_CASSANDRA=NO \ -DPLUGIN_CONNECT=NO \ -DPLUGIN_EXAMPLE=NO \ -DPLUGIN_FEDERATED=NO \ -DPLUGIN_FEDERATEDX=NO \ -DPLUGIN_FEEDBACK=NO \ -DPLUGIN_MROONGA=NO \ -DPLUGIN_MYISAMMRG=NO \ -DPLUGIN_OQGRAPH=NO \ -DPLUGIN_PARTITION=NO \ -DPLUGIN_PERFSCHEMA=NO \ -DPLUGIN_ROCKSDB=NO \ -DPLUGIN_SEMISYNC=NO \ -DPLUGIN_SEQUENCE=NO \ -DPLUGIN_SPHINX=NO \ -DPLUGIN_SPIDER=NO \ -DPLUGIN_TOKUDB=NO \ -DPLUGIN_XTRADB=NO \ -DWITHOUT_DYNAMIC_PLUGINS=ON \ -DWITH_ATOMIC_OPS=smp \ -DWITH_EMBEDDED_SERVER=OFF \ -DWITH_INNODB_DISALLOW_WRITES=OFF \ -DWITH_INNODB_BZIP2=OFF \ -DWITH_INNODB_LZ4=OFF \ -DWITH_INNODB_LZMA=OFF \ -DWITH_INNODB_LZO=OFF \ -DWITH_INNODB_SNAPPY=OFF \ -DWITH_MYSQLCOMPAT=ON \ -DSECURITY_HARDENED=OFF \ -DWITH_LIBARCHIVE=OFF \ -DWITH_LIBWRAP=OFF \ -DWITH_MARIABACKUP=OFF \ -DWITH_PIC=NO \ -DWITH_READLINE=OFF \ -DWITH_SAFEMALLOC=OFF \ -DWITH_VALGRIND=OFF \ -DWITH_WSREP=OFF \ -DWITH_JEMALLOC=OFF \ -DWITH_SSL=system \ -DWITH_ZLIB=system Am 25.03.19 um 22:28 schrieb MariaDB Announce List: > The MariaDB Foundation is pleased to announce the availability > of MariaDB 10.2.23, the latest stable release in the MariaDB > 10.2 series, as well as MariaDB Connector/J 2.4.1, the latest > stable MariaDB Connector/J release. > > See the Release Notes and Changelogs for details. > > > - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > > MariaDB 10.2.23 > - Release Notes: https://mariadb.com/kb/en/mdb-10223-rn/ > - Changelog: https://mariadb.com/kb/en/mdb-10223-cl/ > - Downloads: https://downloads.mariadb.org/mariadb/10.2.23 > > About MariaDB 10.2: > - https://mariadb.com/kb/en/what-is-mariadb-102/ > > APT and YUM Repository Configuration Generator: > - https://downloads.mariadb.org/mariadb/repositories/ > > > MariaDB Connector/J 2.4.1 > - Release Notes: https://mariadb.com/kb/en/mcj-241-rn/ > - Changelog: https://mariadb.com/kb/en/mcj-241-cl/ > - Downloads: https://downloads.mariadb.org/connector-java/2.4.1/ > > - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - > > There is an ever-growing library of MariaDB books available to help > you get the most out of MariaDB. See the MariaDB Books page for > details and links: > > - https://mariadb.org/learn/books/ > > > - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - > > MariaDB includes a User Feedback plugin. This plugin is disabled by > default. If enabled, it submits basic, completely anonymous MariaDB > usage information. This information is used by the developers to > track trends in MariaDB usage to better guide development efforts. > > If you would like to help make MariaDB better, please add > "feedback=ON" to your my.cnf or my.ini file! > > See http://mariadb.com/kb/en/user-feedback-plugin for more > information. > > > - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > > The project always strives for quality, but in reality, nothing is > perfect. Please take time to report any issues you encounter at: > > - http://jira.mariadb.org > > Note that the bug tracker is not a support channel. If you are > running MariaDB in an enterprise environment, please consider paying > for support and related services from a commercial company: > > - https://mariadb.org/about/service-providers/ > > MariaDB is a true open source project. We welcome everyone's > contributions, be it by testing, submitting good bug reports, > debugging and writing code, writing documentation or in any other > way that helps to make the MariaDB server and related > software ever better.

2 2

[Maria-discuss] MariaDB version of Function Name Parsing and Resolution
by mariadb＠biblestuph.com 25 Mar '19

25 Mar '19

Is there anywhere a MariaDB specific version of the document here: https://dev.mysql.com/doc/refman/8.0/en/function-resolution.html Or can someone just tell me which functions are affected by IGNORE_SPACE for MariaDB 10.3? I'm guessing that at least DATE_FORMAT has been added to that list at some point though it doesn't appear as such in any of the MySQL docs. (On a test version of 10.3 I'm getting a DATE_FORMAT error that I didn't have on 5.5). I can correct my spacey statements easily enough, but it would be helpful to know what functions I'm looking for. Thank you!

2 2

[Maria-discuss] mysqld --initialize
by Felipe Gasper 22 Mar '19

22 Mar '19

Hi all, Does MariaDB intend to support “mysqld --initialize”? Thank you! -Felipe Gasper Mississauga, Ontario

3 3

[Maria-discuss] OT Advice Sought: Migrating from to MySQL replication to Maria cluster
by Richard Reina 20 Mar '19

20 Mar '19

Since 2001 I have been running MySQL for a database application that runs on a private LAN. There all only a few users but the data is important to me so I have had replication with a handful of slave servers -- I also backup daily with mysqldump. I recently found out that my slaves were broken -- in that not all update quieres replicate becuase I configured them wrong using replicate-ignore-db. https://stackoverflow.com/questions/55151424/update-database-table-set-name… My master server is also pretty old and running an old version of MySQL. It is definitely time to upgrade. My question is should I try to migrate to MariaDB replication or MariaDB/Galera Cluster? How much harder is configuring and maintaining a DB cluster vs replication? Does MariaDB have any paid support option where I can hire someone to help me set up a DB cluster? Thanks, Richard

2 2

[Maria-discuss] MariaDB-10.2.11 Long Time To Start
by Michael Caplan 15 Mar '19

15 Mar '19

Hi, I'm setting up a replication slave based off of MySQL 5.6. There are a large number of tables (400K). The MySQL 5.6 master takes around 10 minutes to start up, where the new MariaDB 10.2 slave takes close to 30 minutes. What is making the startup take soo long? In the below mysql log, you can see in the startup sequence between "Highest supported file format is Barracuda." and "InnoDB: 128 out of 128 rollback segments are active." the startup process takes the majority of its time: 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Uses event mutexes 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Compressed tables use zlib 1.2.8 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Using Linux native AIO 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Number of pools: 1 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Using SSE2 crc32 instructions 2018-01-07 9:38:15 139980432365760 [Note] InnoDB: Initializing buffer pool, total size = 54G, instances = 8, chunk size = 128M 2018-01-07 9:38:18 139980432365760 [Note] InnoDB: Completed initialization of buffer pool 2018-01-07 9:38:18 139918113195776 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority(). 2018-01-07 9:38:18 139980432365760 [Note] InnoDB: Highest supported file format is Barracuda. 2018-01-07 10:11:48 139980432365760 [Note] InnoDB: 128 out of 128 rollback segments are active. 2018-01-07 10:11:48 139980432365760 [Note] InnoDB: Creating shared tablespace for temporary tables 2018-01-07 10:11:48 139980432365760 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2018-01-07 10:11:48 139980432365760 [Note] InnoDB: File './ibtmp1' size is now 12 MB. 2018-01-07 10:11:48 139980432365760 [Note] InnoDB: Waiting for purge to start 2018-01-07 10:11:48 139980432365760 [Note] InnoDB: 5.7.20 started; log sequence number 1394303471760 2018-01-07 10:11:48 139919461500672 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool 2018-01-07 10:11:48 139980432365760 [Note] Server socket created on IP: '::'. 2018-01-07 10:11:49 139980432365760 [Note] Reading of all Master_info entries succeded 2018-01-07 10:11:49 139980432365760 [Note] Added new Master_info '' to hash table 2018-01-07 10:11:49 139980432365760 [Note] /usr/sbin/mysqld: ready for connections. Version: '10.2.11-MariaDB-10.2.11+maria~xenial-log' socket: '/var/lib/mysql/mysql.sock' port: 3306 mariadb.org binary distribution Any ideas why? I've included my my.conf file below. Thanks, Mike # Generated by Percona Configuration Wizard (http://tools.percona.com/) version REL5-20120208 # Configuration name usaddxprdsqlpm3 generated formcaplan(a)labnet.net at 2017-12-22 13:49:58 [mysql] # CLIENT # port = 3306 socket = /var/lib/mysql/mysql.sock [mysqladmin] # CLIENT # port = 3306 socket = /var/lib/mysql/mysql.sock [mysqld] # GENERAL # user = mysql default-storage-engine = InnoDB socket = /var/lib/mysql/mysql.sock pid-file = /var/lib/mysql/mysql.pid character-set-server = utf8 collation_server = utf8_general_ci performance_schema = 0 # MyISAM # key-buffer-size = 32M myisam-recover = FORCE,BACKUP # SAFETY # max-allowed-packet = 20M max-connect-errors = 1000000 skip-name-resolve sysdate-is-now = 1 innodb = FORCE # DATA STORAGE # datadir = /var/lib/mysql/ # BINARY LOGGING # log-bin = /var/lib/mysql/mysql-bin binlog_format = MIXED server-id = 3 expire-logs-days = 7 sync-binlog = 1 # REPLICATION # read-only = 1 skip-slave-start = 1 log-slave-updates = 1 relay-log = /var/lib/mysql/relay-bin slave-net-timeout = 60 sync-master-info = 1 sync-relay-log = 1 sync-relay-log-info = 1 # CACHES AND LIMITS # tmp-table-size = 32M max-heap-table-size = 32M query-cache-type = 0 query-cache-size = 0 max-connections = 500 thread-cache-size = 50 open-files-limit = 65535 table-definition-cache = 4096 table-open-cache = 10240 # INNODB # innodb-flush-method = O_DIRECT innodb-log-files-in-group = 2 innodb-log-file-size = 512M innodb-flush-log-at-trx-commit = 1 innodb-file-per-table = 1 innodb-buffer-pool-size = 54G # LOGGING # log-error = /var/lib/mysql/mysql-error.log log-queries-not-using-indexes = 0 slow-query-log = 0 slow-query-log-file = /var/lib/mysql/mysql-slow.log [mariadb] plugin-load-add=file_key_management file_key_management_filename=/var/lib/mysql/keys.enc file_key_management_filekey=FILE:/var/lib/mysql/mysql.key file_key_management_encryption_algorithm=AES_CTR encrypt_binlog=0

3 19

[Maria-discuss] how to file a problem / bug ?
by Norbert Zawodsky 14 Mar '19

14 Mar '19

Hello to everybody! I hope that this mailing list is the right place to ask this question... I have been using mysql, and since it came out mariadb, for years now without any problem. Now, something serious (a bug ?) suddendly happened. (mariadb server crashed and a whole table was gone afterwards. So I wonder where would be the right place to communicate / discuss this problem? Hope that someone here can point me in the right direction. regards, Norbert

4 4

[Maria-discuss] Chewing Through Swap - Swappiness = 0
by Michael Caplan 09 Mar '19

09 Mar '19

Hi, I'm trying to figure out why my recently put into production MariaDB is so swap hungry. I'm running 10.2.14, with roughly 300GB data (1000K +/- tables). 95% tables are innodb. I have 64GB RAM, with INNODB buffer pool size set to 50GB (full my.cnf below). The OS is Ubuntu 16.04.4. This is a dedicated MariaDB server. I have swappiness set to 0. I started with available swap set to just shy of 1GB. When swap got to 85% used, I bumped swap to 3GB. A day later, swap again was 85% used, and I bumped it to 5GB. A day later, swap again was 85% used, so I bumped it to 15GB. 2 days later 50% of the available swap was used. I restarted the DB moments ago, freeing up all 15GB but 128MB of swap: total used free shared buff/cache available Mem: 62G 20G 4.7G 266M 37G 41G Swap: 14G 128M 14G My understanding is that the OS should never allocate swap when swappiness is 0, so that has me confused. I've had similar issues with MySQL 5.6 (what I upgraded from) dipping into swap, but that instance had swappiness set to 1, and never consumed more than 5GB of swap. Questions: 1) How much of this is an OS issue vs MariaDB issue? 2) What MariaDB config vars should I be looking at to fix this issue? 3) What linux config vars should I be looking at to fix this issue? Thanks, Mike [mysqld] # GENERAL # user = mysql default-storage-engine = InnoDB character-set-server = utf8 collation_server = utf8_general_ci performance_schema = 0 max_allowed_packet = 16777216 sql_mode = "NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION" # MyISAM # key-buffer-size = 32M myisam-recover = FORCE,BACKUP # SAFETY # max-allowed-packet = 16777216 max-connect-errors = 1000000 skip-name-resolve sysdate-is-now = 1 innodb = FORCE local_infile = 0 secure_auth = 1 safe_user_create = 1 skip_symbolic_links = 1 wait_timeout = 28800 # DATA STORAGE # datadir = /var/lib/mysql/ # BINARY LOGGING # log-bin = /var/lib/mysql/mysql-bin binlog_format = MIXED server-id = 3 expire-logs-days = 7 sync-binlog = 1 # REPLICATION # read-only = 1 skip-slave-start = 1 log-slave-updates = 1 relay-log = /var/lib/mysql/relay-bin slave-net-timeout = 60 sync-master-info = 1 sync-relay-log = 1 sync-relay-log-info = 1 # CACHES AND LIMITS # tmp-table-size = 32M max-heap-table-size = 32M query-cache-type = 0 query-cache-size = 0 max-connections = 500 thread-cache-size = 50 open-files-limit = 65535 table-definition-cache = 4096 table-open-cache = 10240 # INNODB # innodb-flush-method = O_DIRECT innodb-log-files-in-group = 2 innodb-log-file-size = 512M innodb-flush-log-at-trx-commit = 2 innodb-file-per-table = 1 innodb-buffer-pool-size = 50G

3 8

[Maria-discuss] MariaDB-10.4 / Galera and GTIDs - aka we now have two different GTID implementations
by Daniel Black 04 Mar '19

04 Mar '19

Hi, I was excited to come across the Galera-4 release notes and blog. http://galeracluster.com/2019/02/galera-cluster-4-available-for-use-in-the-… It was good to see causal read functions that I'd hoped for in https://jira.mariadb.org/browse/MDEV-10715. WSREP_LAST_WRITTEN_GTID/WSREP_LAST_SEEN_GTID/ WSREP_SYNC_WAIT_UPTO_GTID functions which seemed to mirror existing functions like MASTER_GTID_WAIT and GTID variables. The reason these are different names is because a MariaDB GTID is different from a Galera one. *Having two GTID implementations is insane*. To state the obvious from a user point of view, we've now got two Global Transaction Identification implementations. Application and framework writers like Django/Drupal now have to handle now try to handle consistently with 00000000-0000-0000-0000-000000000000:25 for Galera and 0-1-33 for MariaDB async gtid replication. This is not just a format string difference. The an implementation requires a disparate set of functions to implement when they could of been consolidated. A mixed topology setup could be hidden from the application implementation if the same functions where used. There is/was also a option/proposal that had MariaDB gtid in the protocol save a round trip retrieval of a GTID - quite useful. There is also a bunch of documentation that refers to GTID and its going to absolutely horrible to try to keep the concepts separated as you try to configure a system. An issue like MDEV-10715, the most voted for and watched open issue in JIRA, (and related MDEV-14153), should of had a very priority than this when the implementation from Codership was been merged. This shoehorned in implementation from Codership is a very poor fit. Giving MDEV-10715 a critical priority and a 10.5 target is fiction when there isn't going to be a new galera wsrep api implementation for a number of years. An extra field in the protocol is all it would of taken (comment in MDEV-10715 from 8 months ago). 10.4.3 is out (really an RC?), the galera code got merge in 10.4.2, and the source code of galera-4 isn't even released. Hopefully the tight relationship between MariaDB Corporation and Codership is enough to get this fixed because from an architectural point of view, because the current implementation shouldn't of been merged (contractual arrangement or not). Developers, MariaDB and Codership you've lost track of your user base because the feedback, that is readily available, is ignored. Sadly, Daniel

2 1

Re: [Maria-discuss] Server system variables which description I haven't found
by Michal Schorm 28 Feb '19

28 Feb '19

> https://mariadb.com/kb/en/library/full-list-of-mariadb-options-system-and-s… This is the list I was looking for! Thank you. > Whether the description of each is good enough, is a separate question. I would be in favor of more verbose description. Stack trace: Does that mean without "--stack-trace" I won't get the trace? gdb: I understand it as "--gdb" is meant for runtime debugging and has no effect to the coredump files? does that mean "disable_gdb" option does not exists? (anymore?) -- Michal Schorm Software Engineer Core Services - Databases Team Red Hat -- On Wed, Feb 27, 2019 at 4:16 PM Elena Stepanova <elenst(a)mariadb.com> wrote: > > Hi Michal, > > On 02/27/2019 05:07 PM, Michal Schorm wrote: > > Hello everybody, > > > > In the article about "Enabling Core Dumps" [1] there is an example, > > how to properly configure the server for such cases: > > [mariadb] > > stack-trace > > core-file > > disable-gdb > > > > However, the page listing server system variables [2] does not > > describe two of them ("stack-trace", "disable-gdb") and I would like > > That's because they're not system variables, they are command-line > options. I recommend this page as a starting point, it's more universal: > > https://mariadb.com/kb/en/library/full-list-of-mariadb-options-system-and-s… > > Then, for the first one it would send you to > > https://mariadb.com/kb/en/library/mysqld-options/#-stack-trace > > for the other one, you would have to guess that you need to search for > "gdb", not "disable-gdb": > > https://mariadb.com/kb/en/library/mysqld-options/#-gdb > > Whether the description of each is good enough, is a separate question. > > /E > > > > to know what those options do. In which cases I should use each one or > > some combination. Or, since I haven't found their meaning, if there > > aren't long obsoleted. or if the are only applicable to specific > > MariaDB versions. > > Or / and I'm just seeking help on where to find simmilar variables not > > listed on the page [2]. > > > > > > [1] https://mariadb.com/kb/en/library/enabling-core-dumps/ > > [2] https://mariadb.com/kb/en/library/server-system-variables/ > > > > -- > > > > Michal Schorm > > Software Engineer > > Core Services - Databases Team > > Red Hat > > > > -- > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~maria-discuss > > Post to : maria-discuss(a)lists.launchpad.net > > Unsubscribe : https://launchpad.net/~maria-discuss > > More help : https://help.launchpad.net/ListHelp > >

2 2

[Maria-discuss] Server system variables which description I haven't found
by Michal Schorm 27 Feb '19

27 Feb '19

Hello everybody, In the article about "Enabling Core Dumps" [1] there is an example, how to properly configure the server for such cases: [mariadb] stack-trace core-file disable-gdb However, the page listing server system variables [2] does not describe two of them ("stack-trace", "disable-gdb") and I would like to know what those options do. In which cases I should use each one or some combination. Or, since I haven't found their meaning, if there aren't long obsoleted. or if the are only applicable to specific MariaDB versions. Or / and I'm just seeking help on where to find simmilar variables not listed on the page [2]. [1] https://mariadb.com/kb/en/library/enabling-core-dumps/ [2] https://mariadb.com/kb/en/library/server-system-variables/ -- Michal Schorm Software Engineer Core Services - Databases Team Red Hat --

2 1

[Maria-discuss] MariaDB 10.1: binlog stop updating
by Benoit Plessis 22 Feb '19

22 Feb '19

Hi, I have a few mysql cluster, previously on 5.5 (debian jessie) that we are upgrading in mariadb 10.1 (debian stretch) for now. We are experiencing two major issues with the production trafic: * We saw a huge increase in on disk tmp table space used (serveurs with 4Gb of free space in / (including /tmp) had to be added an additionnal 20Gb /tmp volume and even that is no enough everytime * If the replication process has to write a tmp file to execute the query, and log slave updates is active then in the even of the /tmp volume being full, the update of the binlog will also fail erroneouslly with a "No space" error and will stop every following binlog write. 2019-02-20 15:24:12 140618945124096 [ERROR] Slave SQL: Could not execute Write_rows_v1 event on table xxx.yyyy; Error writing file '/tmp/MLxClNzW' (Errcode: 28 "No space left on device"), Error_code: 3; Error writing file '/var/lib/mysql/mysql-bin' (errno: 28 "No space left on device"), Error_code: 1026; Writing one row to the row-based binary log failed, Error_code: 1534; handler error HA_ERR_RBR_LOGGING_FAILED; the event's master log mysql-bin.006843, end_log_pos 42848762, Gtid 0-70-467485, Internal MariaDB error code: 3 2019-02-20 15:24:12 140618945124096 [Warning] Slave: Error writing file '/tmp/MLxClNzW' (Errcode: 28 "No space left on device") Error_code: 3 2019-02-20 15:24:12 140618945124096 [Warning] Slave: Error writing file '/var/lib/mysql/mysql-bin' (errno: 28 "No space left on device") Error_code: 1026 2019-02-20 15:24:12 140618945124096 [Warning] Slave: Writing one row to the row-based binary log failed Error_code: 15342019-02-20 15:24:12 140618945124096 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.006843' position 42814887 Does someone know if they have been improvement in 10.2/10.3 on theses issues ?

4 8

[Maria-discuss] “system user” in SHOW PROCESSLIST
by Felipe Gasper 15 Feb '19

15 Feb '19

Hi all, https://mariadb.com/kb/en/library/show-processlist/ ^^ The above doesn’t describe “system user” in the result of SHOW PROCESSLIST, but that’s what I observe in 10.2.21. What is the meaning of “system user” in the output of this command? Is there a list of these “special” values for the User column? Are these reserved names (i.e., no DB user should be named “system user”)? Thank you! -FG

4 4

[Maria-discuss] Lock Tables and InnoDB
by mariadb＠Biblestuph.com 06 Feb '19

06 Feb '19

I'm missing something in regard to LOCK TABLES when used with InnoDB. Per the documentation here: https://mariadb.com/kb/en/library/lock-tables-and-unlock-tables/ "LOCK TABLES works on XtraDB/InnoDB tables only if the innodb_table_locks system variable is set to 1 (the default) and autocommit is set to 0 (1 is default). Please note that no error message will be returned on LOCK TABLES with innodb_table_locks = 0." But it appears to me that LOCK TABLES *does* work even when autocommit is set to 1, thus I'm unclear as to what is meant by the statement above. Example: MariaDB [MyDB]> show variables like '%version%'; +-------------------------+----------------------+ | Variable_name | Value | +-------------------------+----------------------+ | innodb_version | 5.5.61-MariaDB-38.13 | | protocol_version | 10 | | slave_type_conversions | | | version | 5.5.62-MariaDB | | version_comment | MariaDB Server | | version_compile_machine | x86_64 | | version_compile_os | Linux | +-------------------------+----------------------+ 7 rows in set (0.00 sec) MariaDB [MyDB]> CREATE TABLE MyInnoDBTest ( -> some_number smallint(5) unsigned not null, -> some_text varchar(20) not null, -> primary key (some_number) -> ) Engine=InnoDB; Query OK, 0 rows affected (0.10 sec) MariaDB [MyDB]> INSERT INTO MyInnoDBTest ( some_number, some_text ) VALUES ( 1, 'One' ), ( 2, 'Two' ), ( 3, 'Three' ); Query OK, 3 rows affected (0.00 sec) Records: 3 Duplicates: 0 Warnings: 0 MariaDB [MyDB]> SELECT * FROM MyInnoDBTest; +-------------+-----------+ | some_number | some_text | +-------------+-----------+ | 1 | One | | 2 | Two | | 3 | Three | +-------------+-----------+ 3 rows in set (0.00 sec) MariaDB [MyDB]> SELECT @@autocommit; +--------------+ | @@autocommit | +--------------+ | 1 | +--------------+ MariaDB [MyDB]> SHOW VARIABLES LIKE 'innodb_table_locks'; +--------------------+-------+ | Variable_name | Value | +--------------------+-------+ | innodb_table_locks | ON | +--------------------+-------+ 1 row in set (0.00 sec) MariaDB [MyDB]> LOCK TABLE MyInnoDBTest WRITE; Query OK, 0 rows affected (0.00 sec) ---------------------- Now, in another session, I am unable to do anything with the table, which is what I would suspect if the LOCK TABLES *did* work (I had to CTRL-C out of each statement): MariaDB [MyDB]> SELECT * FROM MyInnoDBTest; ^CCtrl-C -- query killed. Continuing normally. ERROR 1317 (70100): Query execution was interrupted MariaDB [MyDB]> UPDATE MyInnoDBTest SET some_text = 'Four' WHERE some_number = 3; ^CCtrl-C -- query killed. Continuing normally. ERROR 1317 (70100): Query execution was interrupted MariaDB [MyDB]> UPDATE MyInnoDBTest SET some_text = 'Four' WHERE some_number = 4; ^CCtrl-C -- query killed. Continuing normally. ERROR 1317 (70100): Query execution was interrupted MariaDB [MyDB]> INSERT INTO MyInnoDBTest ( some_number, some_text ) VALUES ( 4, 'Four' ); ^CCtrl-C -- query killed. Continuing normally. ERROR 1317 (70100): Query execution was interrupted MariaDB [MyDB]> DELETE FROM MyInnoDBTest WHERE some_number = 3; ^CCtrl-C -- query killed. Continuing normally. ERROR 1317 (70100): Query execution was interrupted ----------------------- What am I missing? Thanks, Dan

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[Maria-discuss] InnoDB, Cold Physical Backups, and Transportable Tablespaces
by mariadb＠Biblestuph.com 06 Feb '19

06 Feb '19

Trying to get my head around how (if) the transportable tablespaces feature of InnoDB can be used in conjunction with cold DB backups. I'm strictly talking here about a DB where innodb_file_per_table=1. Specifically, is "FLUSH TABLES FOR EXPORT" necessary when doing a cold backup of the DB (using innodb_fast_shutdown=0)? I.E., I originally envisioned something like this: 1.) Save a copy of all CREATE TABLE statements for all tables 2.) Shutdown the DB with innodb_fast_shutdown=0 3.) Copy the full contents of the data dir, cnf, etc. Now, my hope was that I would be able to not only restore the full DB as needed from the saved copy, but also be able to restore individual tables both to the original source DB as well as remote DBs, using the CREATE TABLE statement to create the table on the remote, ALTER TABLE ... DISCARD TABLESPACE, copy the .ibd and .frm in, and then ALTER TABLE ... IMPORT TABLESPACE. But trying this I get: ERROR 1030 (HY000): Got error -1 from storage engine I'm currently using MariaDB 5.5, thus I don't have support for FLUSH TABLES FOR EXPORT. But at this point I wasn't sure if I just need to upgrade for this to work or if I was completely barking up the wrong tree. If I did upgrade to 10.0 (or later), would my plan above work as described? Or would I also need to do the FLUSH TABLES FOR EXPORT (perhaps before step 1)? Thanks, Dan

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[Maria-discuss] MyRocks startup error in MariaDB 10.2.18
by Jonas Krauss 15 Jan '19

15 Jan '19

Hi all, we had a database setup running in production for quite some time (> 5 months) and it crashed during last weekend without obvious reason. MariaDB error log stops with (seemingly most useful output set to bold): 2019-01-14 9:07:47 139766003611904 [Note] RocksDB: 2 column families found 2019-01-14 9:07:47 139766003611904 [Note] RocksDB: Column Families at start: 2019-01-14 9:07:47 139766003611904 [Note] cf=default 2019-01-14 9:07:47 139766003611904 [Note] write_buffer_size=134217728 2019-01-14 9:07:47 139766003611904 [Note] target_file_size_base=268435456 2019-01-14 9:07:47 139766003611904 [Note] cf=__system__ 2019-01-14 9:07:47 139766003611904 [Note] write_buffer_size=134217728 2019-01-14 9:07:47 139766003611904 [Note] target_file_size_base=268435456 mysqld: /home/buildbot/buildbot/build/mariadb-10.2.18/storage/rocksdb/rocksdb/db/column_family.cc:1238: *rocksdb::ColumnFamilySet::~ColumnFamilySet(): Assertion `last_ref' failed.* 190114 9:07:58 [ERROR] mysqld got signal 6 ; ... The rest is a memory dump seemingly not too helpful(?). We tried the various recovery modes of rocksdb_wal_recovery_mode (0,2,3) but none seems to have any effect, the output in the log is exactly the same. *Version and OS infos*: MariaDB version: 10.2.18-MariaDB-10.2.18+maria~stretch-log Running on Debian Linux version 4.9.0-8-amd64 ( debian-kernel(a)lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1) ) #1 SMP Debian 4.9.110-3+deb9u6 (2018-10-08) We use *jemalloc* as memory allocator. 64GB RAM machine with RAID1 SSD 256GB for logs and 10TB HDD for tables Here is the *rocksdb config part of the my.cnf*: plugin-load-add = ha_rocksdb.so default-storage-engine = rocksdb rocksdb_unsafe_for_binlog = 1 # enables statement based replication rocksdb_datadir = /var/local/mysql/rocksdb rocksdb_wal_dir = /var/mysql_logs/rocksdb rocksdb_tmpdir = /var/mysql_logs/rocksdb rocksdb_flush_log_at_trx_commit = 0 rocksdb_use_direct_io_for_flush_and_compaction = 0 rocksdb_use_direct_reads = 0 rocksdb_max_open_files = -1 rocksdb_max_background_jobs = 8 rocksdb_max_total_wal_size = 4G rocksdb_block_size = 64K rocksdb_block_cache_size = 16G rocksdb_table_cache_numshardbits = 6 rocksdb_new_table_reader_for_compaction_inputs = 1 rocksdb_compaction_readahead_size = 4M #rocksdb_db_write_buffer_size = 0 # max write buffer across all column families, zero = disabled #rocksdb_wal_recovery_mode = 1 rocksdb_bytes_per_sync = 4M rocksdb_wal_bytes_per_sync = 4M rocksdb_rate_limiter_bytes_per_sec = 80M # MB/s. Increase if you're running on higher spec machines rocksdb_compaction_sequential_deletes_count_sd = 1 rocksdb_compaction_sequential_deletes = 199999 rocksdb_compaction_sequential_deletes_window = 200000 #rocksdb_rpl_lookup_rows=0 rocksdb_default_cf_options=write_buffer_size=128m;max_write_buffer_number=4;target_file_size_base=256m;max_bytes_for_level_base=2560m;target_file_size_multiplier=2;level0_file_num_compaction_trigger=4;level0_slowdown_writes_trigger=10;level0_stop_writes_trigger=15;compression=kSnappyCompression;bottommost_compression=kZlibCompression;compression_opts=-14:1:0;block_based_table_factory={cache_index_and_filter_blocks=1;filter_policy=bloomfilter:10:false;whole_key_filtering=1};level_compaction_dynamic_level_bytes=true;optimize_filters_for_hits=true;compaction_pri=kMinOverlappingRatio Does anyone have a idea what could cause this crash? Google did not return helpful results, most similar thing anyone had is this in my search: https://github.com/facebook/mysql-5.6/issues/391 Any help is greatly appreciated. Best regards Jonas

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[Maria-discuss] Full text search not matching 2 letter word
by Andrew Wood 09 Jan '19

09 Jan '19

Im trying to run a full text query on a two letter keyword 'K7'. I have set ft_min_word_len=2 and restarted the server and if I view the system vars in Mysql Workbench it shows it is set correctly. I have then dropped and re-created the index on the descrip column. It is an InnoDB table so I cannot do repair table. Im running the following query which I expect to match the following record but it doesnt. Full text searches for other words match OK. select * from asset where type ='DOCUMENTS' and (match(descrip) against ('K7' in boolean mode)) ; +-----+--------------------+----------------------------------------------------------------------------------------------+-----------+-------------------+--------------+-------------+ | id | type | descrip | subtype | intendeduse | location | assetfileid | +-----+--------------------+---------------------------------------------------------------------------------------------+------------+-------------------+--------------+-------------+ | 153 | DOCUMENTS | Telephone Kiosk No. 7 K7 Interior promo photo from field trial. | PHOTO | DISPLAY | STORAGE | 152 | +-----+--------------------+----------------------------------------------------------------------------------------------+------------+------------------+--------------+-------------+ Any ideas why this is not working? Thanks Andrew

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[Maria-discuss] will query_response_time be removed?
by Federico Razzoli 02 Jan '19

02 Jan '19

I see that Percona has removed query_response_time in version 8.0. Does this plugin have a future in MariaDB? Cheers,Federico

2 1

[Maria-discuss] Post-MySQL(5.6) to MariaDB migration question - why are master_info_repository=TABLE and relay_log_info_repository=TABLE not supported?
by Artem Russakovskii 25 Dec '18

25 Dec '18

Hi, This is my first post to the mariadb list, as I just migrated from mysql to mariadb (OpenSUSE stopped supporting mysql after Leap 15.0). I immediately ran into an issue migrating, with the slave not starting. Upon further analysis, it turned out to be the lack of support of master_info_repository=TABLE and relay_log_info_repository=TABLE in mariadb, which means the master information effectively disappeared as far as the slave server is concerned. I am very surprised by this revelation. Not only did it break replication (I had to figure this out and reassemble the CHANGE MASTER TO command with the values fished out from the slave_master_info table), it also seems to be a step back when it comes to crash-safe replication. Does anyone have an explanation for why we're now back to master.info and relay-log.info on disk rather than nice tables in memory? See https://www.percona.com/blog/2013/09/13/enabling-crash-safe-slaves-with-mys… from years ago for more info, for example. It'd be great to hear from the core mariadb/mysql developers. The lack of master_info_repository and relay_log_info_repository support is documented here: https://mariadb.com/kb/en/library/system-variable-differences-between-maria… . Thank you. Sincerely, Artem

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[Maria-discuss] Large query performance degrade after converting table from MyISAM to InnoDB
by Conor Murphy 17 Dec '18

17 Dec '18

Hi, I'm trying to covert an existing database from MyISAM to InnoDB. The conversion completed okay, but I'm seeing one particular query causing problems, with MyISAM it was taking ~ 6 minutes to complete, with InnoDB it's taking nearly 14 hours The query is as follows SELECT procid, UNIX_TIMESTAMP(MAX(time)), COUNT(*) AS num FROM proc_stats GROUP BY procid HAVING num < 100 EXPLAIN SELECT procid, UNIX_TIMESTAMP(MAX(time)), COUNT(*) AS num FROM proc_stats GROUP BY procid HAVING num < 100 +------+-------------+------------+-------+---------------+--------+---------+------+-----------+-------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+------------+-------+---------------+--------+---------+------+-----------+-------+ | 1 | SIMPLE | proc_stats | index | NULL | pidIdx | 2 | NULL | 956928549 | | +------+-------------+------------+-------+---------------+--------+---------+------+-----------+-------+ | proc_stats | CREATE TABLE `proc_stats` ( `time` datetime NOT NULL, `siteid` smallint(5) unsigned DEFAULT NULL, `serverid` smallint(5) unsigned NOT NULL, `procid` smallint(5) unsigned NOT NULL, `cpu` smallint(5) unsigned DEFAULT NULL, `mem` mediumint(8) unsigned NOT NULL, `thr` smallint(5) unsigned NOT NULL, `fd` smallint(5) unsigned DEFAULT NULL, `rss` mediumint(8) unsigned DEFAULT NULL, `nproc` tinyint(3) unsigned NOT NULL DEFAULT '0', `sample_interval` smallint(5) unsigned DEFAULT NULL, KEY `pidIdx` (`procid`), KEY `serverTimeIdx` (`serverid`,`time`), KEY `siteIdIdx` (`siteid`,`time`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY RANGE ( TO_DAYS(time)) (PARTITION P20120101 VALUES LESS THAN (734868) ENGINE = InnoDB, PARTITION P20151201 VALUES LESS THAN (736298) ENGINE = InnoDB, PARTITION P20160101 VALUES LESS THAN (736329) ENGINE = InnoDB, PARTITION P20160201 VALUES LESS THAN (736360) ENGINE = InnoDB, PARTITION P20160301 VALUES LESS THAN (736389) ENGINE = InnoDB, PARTITION P20160401 VALUES LESS THAN (736420) ENGINE = InnoDB, PARTITION P20160501 VALUES LESS THAN (736450) ENGINE = InnoDB, PARTITION P20160601 VALUES LESS THAN (736481) ENGINE = InnoDB, PARTITION P20160701 VALUES LESS THAN (736511) ENGINE = InnoDB, PARTITION P20160801 VALUES LESS THAN (736542) ENGINE = InnoDB, PARTITION P20160901 VALUES LESS THAN (736573) ENGINE = InnoDB, PARTITION P20161001 VALUES LESS THAN (736603) ENGINE = InnoDB, PARTITION P20161101 VALUES LESS THAN (736634) ENGINE = InnoDB, PARTITION P20161201 VALUES LESS THAN (736664) ENGINE = InnoDB, PARTITION P20170101 VALUES LESS THAN (736695) ENGINE = InnoDB, PARTITION P20170201 VALUES LESS THAN (736726) ENGINE = InnoDB, PARTITION P20170301 VALUES LESS THAN (736754) ENGINE = InnoDB, PARTITION P20170401 VALUES LESS THAN (736785) ENGINE = InnoDB, PARTITION P20170501 VALUES LESS THAN (736815) ENGINE = InnoDB, PARTITION P20170601 VALUES LESS THAN (736846) ENGINE = InnoDB, PARTITION P20170701 VALUES LESS THAN (736876) ENGINE = InnoDB, PARTITION P20170801 VALUES LESS THAN (736907) ENGINE = InnoDB, PARTITION P20170901 VALUES LESS THAN (736938) ENGINE = InnoDB, PARTITION P20171001 VALUES LESS THAN (736968) ENGINE = InnoDB, PARTITION P20171101 VALUES LESS THAN (736999) ENGINE = InnoDB, PARTITION P20171201 VALUES LESS THAN (737029) ENGINE = InnoDB, PARTITION P20180101 VALUES LESS THAN (737060) ENGINE = InnoDB, PARTITION Q201804 VALUES LESS THAN (737150) ENGINE = InnoDB, PARTITION Q201807 VALUES LESS THAN (737241) ENGINE = InnoDB, PARTITION Q201810 VALUES LESS THAN (737333) ENGINE = InnoDB, PARTITION Q201901 VALUES LESS THAN (737425) ENGINE = InnoDB, PARTITION QMAXVALUE VALUES LESS THAN MAXVALUE ENGINE = InnoDB) */ | While the query is running, all I can see in the processlist is | 64313 | statsadm| 64313 | statsadm | priv:41254 | statsdb | Query | 13001 | Sending data | SELECT procid, MAX(time), COUNT(*) AS num FROM proc_stats GROUP BY procid HAVING num < 100 | 0.000 | Version is 5.5.60-MariaDB Any suggestions on how to localize why the query is taking so long with InnoDB? Thanks, Conor

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[Maria-discuss] Missing rights on 'CREATE ALGORITHM=UNDEFINED DEFINER...'
by Thomas Plant 13 Dec '18

13 Dec '18

Hello all, I have a request from a user who can not create a view in his database. He has the following rights granted: +----------------------------------------------------------------------------------------------------------------+ | Grants for user@% | +----------------------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'user'@'%' IDENTIFIED BY PASSWORD '***************' | | GRANT ALL PRIVILEGES ON `dbname`.* TO 'user'@'%' | +----------------------------------------------------------------------------------------------------------------+ The view he tries to create looks like these: CREATE ALGORITHM=UNDEFINED DEFINER=`xxxxxxxxxxx`(a)`xx.xxx.xxx.x/xxx.xxx.xxx.x` SQL SECURITY DEFINER VIEW `jos_docman_file_counts` AS select `jos_docman_documents`.`storage_path` AS `storage_path`,count(0) AS `count` from `jos_docman_documents` where (`jos_docman_documents`.`storage_type` = 'file') group by `jos_docman_documents`.`storage_path`; And gets as error: #1227 - Access denied; you need (at least one of) the SUPER privilege(s) for this operation What SUPER privilege is needed for this view? The Database is MariaDB 10.1 on Centos 7. Thanks for any hint about his. Greetings, Thomas

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[Maria-discuss] Updating user's max_connections without restart
by Staffan 28 Nov '18

28 Nov '18

Hi, I've tried to change a user's max_connections after the limit has been reached (connection attempts return "has exceeded the 'max_connections_per_hour' resource"). With MariaDB 10.2.18, running using the official docker image, we have "select @@max_connections;" returning 100. We have a user created "WITH MAX_CONNECTIONS_PER_HOUR 50". Now if we bump in to this limit I fail to allow more connections by increasing it. I've tried the following methods (using both 0 and a high value): ALTER USER 'site_devkit_live_index'@'%' WITH MAX_CONNECTIONS_PER_HOUR 0; UPDATE mysql.user SET max_connections = 0 WHERE user='site_devkit_live_index'; FLUSH PRIVILEGES; GRANT USAGE ON *.* TO 'site_devkit_live_index'@'%' WITH MAX_CONNECTIONS_PER_HOUR 0; The following indicates that the updates work: USE mysql; SELECT host, user, max_user_connections, max_connections FROM user; I've also tried deleting and re-creating the user. What would it take to make these updates affect the current instance? We'd like to avoid restarts. regards /Staffan

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[Maria-discuss] Rocksdb_no_file_closes in MariaDB MyRocks
by Jonas Krauss 19 Nov '18

19 Nov '18

Hi all, I am trying to put a MariaDB MyRocks database into production and right now I am facing problems regarding the memory usage of MyRocks. I haven't been able to identify one specific problem but the following links contained some useful information: https://github.com/facebook/rocksdb/issues/3216 https://github.com/facebook/rocksdb/wiki/Memory-usage-in-RocksDB The current behavior of the mysqld process is that when putting the database into production (an OLTPish process) on a machine with 64G RAM and a block cache configured with 16G it starts to slowly accumulate more and more memory until swap is used. This is obviously not suitable for production. Currently I am wondering about a particular statistic, the number of open and closed files. *Particularly I am wondering why Rocksdb_no_file_closes is staying a zero at all time while Rocksdb_no_file_opens slowly increases over time.* Does anybody know why that is? Could it be responsible for the steady memory increase? I experimented with the parameter rocksdb_max_open_files, it was set to -1, I tried setting it to 1536, 512 and 128. The lower the value the faster Rocksdb_no_file_opens increases (which seems right). However, at no setting do I see any change in Rocksdb_no_file_closes. Running MariaDB 10.2.18. Here are the settings regarding rocksdb in my.cnf: # MyRocks plugin-load-add = ha_rocksdb.so default-storage-engine = rocksdb default-tmp-storage-engine = MyISAM transaction-isolation = READ-COMMITTED rocksdb_unsafe_for_binlog = 1 # enables statement based replication rocksdb_datadir = /var/local/mysql/rocksdb rocksdb_wal_dir = /var/mysql_logs/rocksdb rocksdb_tmpdir = /var/mysql_logs/rocksdb rocksdb_flush_log_at_trx_commit = 0 rocksdb_use_direct_io_for_flush_and_compaction = 0 rocksdb_use_direct_reads = 0 rocksdb_max_open_files = 512 rocksdb_max_background_jobs = 8 rocksdb_max_total_wal_size = 4G rocksdb_block_size = 64K rocksdb_block_cache_size = 4G rocksdb_table_cache_numshardbits = 6 rocksdb_new_table_reader_for_compaction_inputs = 1 rocksdb_compaction_readahead_size = 4M #rocksdb_db_write_buffer_size = 0 # max write buffer across all column families, zero = disabled # rate limiter rocksdb_bytes_per_sync = 4M rocksdb_wal_bytes_per_sync = 4M rocksdb_rate_limiter_bytes_per_sec = 80M # MB/s. Increase if you're running on higher spec machines # triggering compaction if there are many sequential deletes rocksdb_compaction_sequential_deletes_count_sd = 1 rocksdb_compaction_sequential_deletes = 199999 rocksdb_compaction_sequential_deletes_window = 200000 # read free replication #rocksdb_rpl_lookup_rows=0 rocksdb_default_cf_options=write_buffer_size=128m;max_write_buffer_number=4;target_file_size_base=256m;max_bytes_for_level_base=2560m;target_file_size_multiplier=2;level0_file_num_compaction_trigger=4;level0_slowdown_writes_trigger=10;level0_stop_writes_trigger=15;compression=kSnappyCompression;bottommost_compression=kZlibCompression;compression_opts=-14:1:0;block_based_table_factory={cache_index_and_filter_blocks=1;filter_policy=bloomfilter:10:false;whole_key_filtering=1};level_compaction_dynamic_level_bytes=true;optimize_filters_for_hits=true;compaction_pri=kMinOverlappingRatio

1 0

[Maria-discuss] SHOW CREATE TABLE returns binary data
by Andy Salnikov 19 Nov '18

19 Nov '18

Hi, one puzzling feature that we have observed with mariadb is the encoding of the result returned from "SHOW CREATE TABLE" query. In our Python-based service we issue that query and we expect the result to be returned as Python string, that worked OK except that we discovered that it breaks for one large/wide table. The query returns Python bytes object for that particular table for some reason. I looked at the result returned from query and it looks like the data is returned using different data type, here is a Python example for two different tables: This is a regular (narrow) table and it works as expected: >>> c.execute("SHOW CREATE TABLE `database`.`table1`") >>> c.description (('Table', 253, 13, 64, 64, 39, 0), ('Create Table', 253, 375, 1024, 1024, 39, 0)) 253 in second tuple means that this is a MYSQL_TYPE_VAR_STRING type, which is converted into Python string. this is for very wide table: >>> c.execute("SHOW CREATE TABLE `qservTest_case130_qserv`.`deepCoadd_meas`") >>> c.description (('Table', 253, 14, 64, 64, 39, 0), ('Create Table', 250, 26235, 78705, 78705, 39, 0)) in this case type code is 250 which means MYSQL_TYPE_MEDIUM_BLOB, and Python (correctly) refuses to understand that this is really a string and keeps it as bytes. It looks like this is triggered by the size of the string, but I could not find any document that mentions this unexpected behavior. Is there any documentation that explains what to expect in this case? Can this behavior be changed with some session or server variable? To convert that BLOB into string I'd also need to know the encoding for its contents, is it supposed to be the same as encoding used to send VAR_STRING type or is it some mariadb-internal encoding used by information schema? Thanks, Andy

1 0

[Maria-discuss] 100% CPU on simple queries when join_buffer_size is large
by marki 17 Nov '18

17 Nov '18

Hey, Server version: 10.0.35-MariaDB SLE 12 SP1 here I have a problem with a query/process hanging "Copying to tmp table" and CPU at 100% MariaDB [iplocator]> EXPLAIN SELECT *, l3l2.time AS time FROM l3l2 JOIN l2l1 USING (mac) JOIN l1human h ON l2l1.switch=h.switch AND l2l1.port=h.portid WHERE ip=INET_ATON('192.168.1.1') ORDER BY l3l2.time DESC -> ; +------+-------------+-------+--------+---------------+---------+---------+-------------------------------------------+--------+---------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+-------+--------+---------------+---------+---------+-------------------------------------------+--------+---------------------------------+ | 1 | SIMPLE | l2l1 | ALL | NULL | NULL | NULL | NULL | 10379 | Using temporary; Using filesort | | 1 | SIMPLE | h | eq_ref | PRIMARY | PRIMARY | 51 | iplocator.l2l1.switch,iplocator.l2l1.port | 1 | Using where | | 1 | SIMPLE | l3l2 | ALL | NULL | NULL | NULL | NULL | 157794 | Using where | +------+-------------+-------+--------+---------------+---------+---------+-------------------------------------------+--------+---------------------------------+ 3 rows in set (0.00 sec) We have made some modifications to my.cnf for Cacti, namely: ; for cacti <3 [mysqld] max_heap_table_size = 92M max_allowed_packet = 16777216 tmp_table_size = 64M join_buffer_size = 64M ; problem with iplocator when this option is set innodb_buffer_pool_size = 462M ;ssd innodb_doublewrite = OFF innodb_additional_mem_pool_size = 80M innodb_flush_log_at_timeout = 3 ;ssd innodb_read_io_threads = 32 ;ssd innodb_write_io_threads = 16 We found out by trial and error that when we do not increase join_buffer_size (leave at default 128k I believe) then the query mentioned above runs ok. However cacti would require us to increase it, which is when the query above will fail with said error. ===================================== 2018-11-16 16:41:17 7fbf9c202700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 15 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 13 srv_active, 0 srv_shutdown, 1 srv_idle srv_master_thread log flush and writes: 5 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 14 OS WAIT ARRAY INFO: signal count 63 Mutex spin waits 52, rounds 366, OS waits 10 RW-shared spins 37, rounds 280, OS waits 4 RW-excl spins 14, rounds 125, OS waits 0 Spin rounds per wait: 7.04 mutex, 7.57 RW-shared, 8.93 RW-excl ------------ TRANSACTIONS ------------ Trx id counter 702870126 Purge done for trx's n:o < 702870081 undo n:o < 0 state: running but idle History list length 220 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 6, OS thread handle 0x7fbf9c202700, query id 581 localhost root init show engine innodb status ---TRANSACTION 702870124, not started MySQL thread id 4, OS thread handle 0x7fbf9c24b700, query id 580 localhost icingaweb2 cleaning up -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (read thread) I/O thread 7 state: waiting for completed aio requests (read thread) I/O thread 8 state: waiting for completed aio requests (read thread) I/O thread 9 state: waiting for completed aio requests (read thread) I/O thread 10 state: waiting for completed aio requests (read thread) I/O thread 11 state: waiting for completed aio requests (read thread) I/O thread 12 state: waiting for completed aio requests (read thread) I/O thread 13 state: waiting for completed aio requests (read thread) I/O thread 14 state: waiting for completed aio requests (read thread) I/O thread 15 state: waiting for completed aio requests (read thread) I/O thread 16 state: waiting for completed aio requests (read thread) I/O thread 17 state: waiting for completed aio requests (read thread) I/O thread 18 state: waiting for completed aio requests (read thread) I/O thread 19 state: waiting for completed aio requests (read thread) I/O thread 20 state: waiting for completed aio requests (read thread) I/O thread 21 state: waiting for completed aio requests (read thread) I/O thread 22 state: waiting for completed aio requests (read thread) I/O thread 23 state: waiting for completed aio requests (read thread) I/O thread 24 state: waiting for completed aio requests (read thread) I/O thread 25 state: waiting for completed aio requests (read thread) I/O thread 26 state: waiting for completed aio requests (read thread) I/O thread 27 state: waiting for completed aio requests (read thread) I/O thread 28 state: waiting for completed aio requests (read thread) I/O thread 29 state: waiting for completed aio requests (read thread) I/O thread 30 state: waiting for completed aio requests (read thread) I/O thread 31 state: waiting for completed aio requests (read thread) I/O thread 32 state: waiting for completed aio requests (read thread) I/O thread 33 state: waiting for completed aio requests (read thread) I/O thread 34 state: waiting for completed aio requests (write thread) I/O thread 35 state: waiting for completed aio requests (write thread) I/O thread 36 state: waiting for completed aio requests (write thread) I/O thread 37 state: waiting for completed aio requests (write thread) I/O thread 38 state: waiting for completed aio requests (write thread) I/O thread 39 state: waiting for completed aio requests (write thread) I/O thread 40 state: waiting for completed aio requests (write thread) I/O thread 41 state: waiting for completed aio requests (write thread) I/O thread 42 state: waiting for completed aio requests (write thread) I/O thread 43 state: waiting for completed aio requests (write thread) I/O thread 44 state: waiting for completed aio requests (write thread) I/O thread 45 state: waiting for completed aio requests (write thread) I/O thread 46 state: waiting for completed aio requests (write thread) I/O thread 47 state: waiting for completed aio requests (write thread) I/O thread 48 state: waiting for completed aio requests (write thread) I/O thread 49 state: waiting for completed aio requests (write thread) Pending normal aio reads: 0 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] , ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0 Pending flushes (fsync) log: 0; buffer pool: 0 2867 OS file reads, 24 OS file writes, 24 OS fsyncs 191.12 reads/s, 17088 avg bytes/read, 1.60 writes/s, 1.60 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 11097, seg size 11099, 152 merges merged operations: insert 108, delete mark 70, delete 0 discarded operations: insert 0, delete mark 0, delete 0 13519.57 hash searches/s, 1502.97 non-hash searches/s --- LOG --- Log sequence number 1299475887198 Log flushed up to 1299475887198 Pages flushed up to 1299475527411 Last checkpoint at 1299475527411 Max checkpoint age 80826164 Checkpoint age target 78300347 Modified age 359787 Checkpoint age 359787 0 pending log writes, 0 pending chkp writes 29 log i/o's done, 1.93 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 504315904; in additional pool allocated 0 Total memory allocated by read views 368 Internal hash tables (constant factor + variable factor) Adaptive hash index 8657696 (7670456 + 987240) Page hash 480232 (buffer pool 0 only) Dictionary cache 2436172 (1919248 + 516924) File system 1027312 (812272 + 215040) Lock system 1200352 (1199272 + 1080) Recovery system 0 (0 + 0) Dictionary memory allocated 516924 Buffer pool size 29567 Buffer pool size, bytes 484425728 Free buffers 26668 Database pages 2839 Old database pages 1067 Modified db pages 582 Percent of dirty pages(LRU & free pages): 1.972 Max dirty pages percent: 75.000 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 5, not young 0 0.33 youngs/s, 0.00 non-youngs/s Pages read 2823, created 16, written 0 188.19 reads/s, 1.07 creates/s, 0.00 writes/s Buffer pool hit rate 999 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 38.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 2839, unzip_LRU len: 0 I/O sum[0]:cur[4], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 1 read views open inside InnoDB 0 RW transactions active inside InnoDB 0 RO transactions active inside InnoDB 0 out of 1000 descriptors used ---OLDEST VIEW--- Normal read view Read view low limit trx n:o 702870080 Read view up limit trx id 702870080 Read view low limit trx id 702870080 Read view individually stored trx ids: ----------------- Main thread process no. 31341, id 140459967563520, state: sleeping Number of rows inserted 11, updated 453, deleted 8, read 12982600 0.73 inserts/s, 30.20 updates/s, 0.53 deletes/s, 865448.97 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 0 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================ Can someone shed some light on this? It seems to me the appearance of the problem might be related to a recent upgrade of the server which included upgrading mariadb from 10.0.21 to 10.0.35 Thx

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[Maria-discuss] Pipeline-stype slave parallel applier
by andrei.elkin＠pp.inet.fi 16 Nov '18

16 Nov '18

Hello, everybody. Let me offer a bunch of ideas for further improvements in replication, and the parallel one specifically. Your comments, thoughts and critical notes are most welcome! Thank you for your time. Andrei Slave balanced parallel applier ================================ There are a few motivations for this project which include the following reflections: - the slower binlog group transactions applying rate by slave the more transaction sizes differ (must've been few bugs reported): the speed of a caravan is determined by the pace of the slowest camel, or more formally as specified by Amdahl's law (KrinstianN pointed that out to me) - while ordered committing of grouped transactions on slave presents some virtues (like guaranteed consistency with master, monotonic changes to slave execution status as measured by GTID) it still must be taxing on performance. Observe that co-prepared transactions of a master binlog group represent a sort of a transaction on its own. Call it epoch [which must revive memories of NDB cluster], and the original transactions as its sub-transactions or branches. Notice that there is no meaning to sub-transaction internal ordering within the epoch. They can be logged to the binary log in any mutual order, still without exposing any inconsistencies to the user. Specifically, say there are two prepared transactions BEGIN /* A */ BEGIN /* B */ INSERT... INSERT... UPDATE... UPDATE... DELETE... DELETE... COMMIT COMMIT entering the binlog group (ordered) commit module. They can end up into binlog as A,B or B,A, and regardless of that (Gtid actually) order also be acknowledged to the user in either way. The latter fact infers that slave does not have to commit the group sub-transaction/branches in the GTID order. It could be done in any order including no order at all like to do so as one epoch commit. Naturally the latter option is impractical to replication. The current conservative scheduler offers a decent parallelization method still suffering from the aforementioned uneven branch's sizes and inter-thread communications caused by ordering. The optimistic scheduler remedies to some level but not fully (an optimistically executed group may be unbalanced too) and even conceding some risk of performance degradation (rollback is costly). There is an idea reminiscent to pipelining to handle the epoch (the master binlog group) as a single transaction but in parallel. That is to execute its statements by multiple workers, this time scheduling them fairly, and "atomically" commit their works. To the fairness part, workers get assigned by a statement at a time from the epoch transaction(sub-transaction BEGIN, COMMIT removed). Say 'E' an epoch consists of 's' of sub-transaction E := { T_1, T_2, ... T_s } For each m from 1 to s sub-transactions T_m gets scheduled to some worker W_1 W_2 ... W_k | | | V V V T_m := { e_1, e_2, ... e_l } Hereinafter I use the TeX math notation, '^' - a superscript attached to the event to designate its parent transaction sequence number (Gtid seq_no), '_' - a subscript to enumerate an object within its compound object. e_i stands for T-ransation's statements, W_t:s are workers. Effectively the epoch breaks into modified branches executed by workers on one to one basic: E := { T'_1, T'_2, ... T'_k } here 'k' is the number of workers engaged, T' indicates the modified transaction. The branches are executed until they are ready to prepare which event is triggered by scheduling of the last statement of the last original sub-transaction. It's clear that sizes of the modified branches are even this time. The last statement worker coordinates 2pc. Thinking more technically workers can consume/pull from the current epoch presented as a queue which is pushed into by statement producer. Here is a possible state of the queue when m:th statement of T_n is about to be pushed: e^n_k -> [ e^n_m-1, ..., e^n_2, e^n_1; ...; e^1_l1, ... e^1_2, e^1_1 ] ...----- T_n ------------| T_n-1,...T_2 |---------- T_1 ---------| A pull by consumer at this point would return e^1_1. Very likely that by the epoch prepare event *all* the branches have been already ready for prepare(). This pipelining parallelization method can work for the single "large" transaction in the binlog group and also could drag into the parallelizable input transactions from later groups if we additionally create master side dependency tracking (think of mysql logical timestamp method). Also notice that the optimisitic scheduler is orthogonal to this method so the two can be combined. Consistency concern ------------------- The epoch parallel execution (scheduling) must respect intra-transaction statement dependencies (e.g FIFO execution order of operations over the same object [record, table]). There is no inter-transaction dependencies, at least in theory. The notion of a leader, the two-phase-commits leader, remains roughly the same as in the existing conservative scheduler. This time more than initiating commits of the epoch branches it also takes care to advance the slave gtid execution status accordingly. It could be implemented as the very last statement of its own T' branch. It's clear that causal dependencies of an user write and a read (to find the effect of that write) can be tracked by WAIT_FOR_GTID() as currently. A plain two-phase commit does admit possibility to catch on slave combinations of the old (pre-epoch) and new version (post-epoch) or some objects of the same transaction if the user hits with non-locking SELECT in a "tiny" time window between commit():s of two branches like in the following example. Let t1,t2 some tables and the binlog group consists of just one transaction T_1 := { update(t1), update(t2) } Let on slave it's modified into two parallel ones: T'_1 := { update(t1) } || T'2 := { update(t2) } After both respond OK to 2pc prepare() and then the leader initiates commit() where could be 4 possible result sets to the contemporary SELECT SET @@session.tx_isolation='REPEATABLE-READ'; SELECT * from t1 as t_1, t2 as t_2; => ... While this is perhaps more than imperfect, I believe it may be relevant only to remote corner cases, but more importantly, we still can refine that doing some *adjustments* in the Engine studied briefly myself of what would be a sub-transaction in Innodb, "ideologically" endorsed and guided by Marko Makela. The idea is to hold the branch's locks even after the branch commits, and delegate their release to the leader. Recoverability -------------- When slave is configured to log in the binary log we must make sure to rollback any prepared epoch branches at the server recovery unless the last branch (of the leader) is also there, prepared. When it does not binlog the problem is that the modified branch's binlog images can't be just flushed one after another especially if the user specifies to log on the slave uniformly with the master that is to preserve the original sub-transaction structures and their boundaries. In such case there are several multiple option, here are some: - use relay-logged image of original sub-transactions (may be limited to the master and slave version combination though;) - reconstruct original sub-transaction's binlog images. That is binlog events "belonging" to an original sub-transaction will be cached cooperatively by workers that took share of the original sub-transaction execution. Optionally at least the caching could be set to allow out of order while the statements are parallelizable, like in the above T1(t1,t2) example. Otherwise the ordering will be preserved through implementing the shared cache as as a queue with an interface to insert an item into the middle. - exotics like to create the slave side "merge" GTID which would embed the original "commit". (The quotes here to allude to the Git's way). While it's a serious subject I am leaving out mariabackup for this moment. I believe it will be feasible to adjust its logics to account as prepared only such transactions that that are prepared in all their branches. More about pipeline style optimization -------------------------------------- As mentioned workers can be made self-serving to assign events for execution at once when become available. That must turn to think of producer-consumer model, potentially lock-free queues, dynamical # of workers to stay in balance with the receiver's pace etc. I think *eventually* we will need to assign the producer role to the IO (receiver) thread, and convert the current SQL (driver) thread into (relay-) logger (we still may have to have such logger for the semisync replication, the relay logger can be opted out otherwise). Here is a picture IO_thread.push() | +---- worker.pull() V V e^s_i -> [ e^s_i-1, ... e^s_1 }, T_s-1, ... ] ^ | SQL.pull() where on the right hand side the two consumers handle a transaction and when both of them have done with it (a worker has read its last event and the logger written it to the relay-log) the query element becomes garbage-collectable.

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[Maria-discuss] Fwd: [MariaDB Announce] MariaDB 10.2.19 now available
by Reindl Harald 14 Nov '18

14 Nov '18

hell, a new file again breaking rpm-build /usr/lib/pkgconfig/libmariadb.pc adjusted mariadb.spec error: File not found: /home/builduser/rpmbuild/BUILDROOT/mariadb-10.2.19-0.fc28.20181114.rh.sandybridge.x86_64/usr/lib64/pkgconfig/libmariadb.pc WTF - why is that crap on a x86_64 system in /usr/lib/pkgconfig/libmariadb.pc instead /usr/lib64/pkgconfig/libmariadb.pc sane people use rpm macros %{_libdir}/pkgconfig/mariadb.pc %{_libdir}/pkgconfig/libmariadb.pc well, another trial and error to fix the build... -------- Weitergeleitete Nachricht -------- Betreff: [MariaDB Announce] MariaDB 10.2.19 now available Datum: Tue, 13 Nov 2018 20:20:34 +0200 Von: MariaDB Announce List <announce(a)mariadb.org> An: announce(a)mariadb.org The MariaDB Foundation is pleased to announce the availability of MariaDB 10.2.19, the latest stable release in the MariaDB 10.2 series.

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[Maria-discuss] Character set & BLOBS on MySQL
by Andrew Wood 07 Nov '18

07 Nov '18

I am in the process of moving some tables from MySQL 5.1 (Linux) MariaDB 10.1 also on Linux. One of the tables stores binary data (either a PDF or JPEG) as a LONGBLOB. The code that reads & writes to the table is PHP and hasnt changed other than having the url of the database server altered. No errors are thrown on reading or writing but JPEGs are coming out corrupted, where as PDFs show fine. I had a hunch it was due to the charset/collation settings even though both tables are identical (the new one was created with the output from mysqldump on the old server). Having run SHOW SESSION VARIABLES LIKE 'character\_set\_%'; on both the old and new server there is a difference but I want to understand why this might be causing the problem before I alter anything. New server: MariaDB [(none)]> SHOW SESSION VARIABLES LIKE 'character\_set\_%'; +------------------------------------+-------------+ | Variable_name | Value | +------------------------------------+-------------+ | character_set_client | utf8mb4 | | character_set_connection | utf8mb4 | | character_set_database | utf8mb4 | | character_set_filesystem | binary | | character_set_results | utf8mb4 | | character_set_server | utf8mb4 | | character_set_system | utf8 | +------------------------------------+-------------+ 7 rows in set (0.00 sec) Old server: mysql> SHOW SESSION VARIABLES LIKE 'character\_set\_%'; +------------------------------------+----------+ | Variable_name | Value | +------------------------------------+----------+ | character_set_client | latin1 | | character_set_connection | latin1| | character_set_database | utf8 | | character_set_filesystem | binary| | character_set_results | latin1 | | character_set_server | latin1 | | character_set_system | utf8 | +------------------------------------+---------+ 7 rows in set (0.00 sec) Also is there a way for the client to specify the correct settings for reading/writing BLOBS on a per connection basis as it might not always be possible to alter the server? Thanks

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[Maria-discuss] account locking?
by Felipe Gasper 05 Nov '18

05 Nov '18

Hello, Does the MariaDB development team intend to add account locking? I don’t see it in the 10.4 roadmap. MySQL added this in 5.7.6. Previously we’d accomplished this by reversing the password hash; for our servers that run MariaDB it would be great to be able to use the same facility. Thank you! -Felipe Gasper

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[Maria-discuss] wsrep_node_incoming_address not honoured?
by George Diamantopoulos 02 Nov '18

02 Nov '18

Hello all, I've setup a galera cluster with 3 nodes, and I believe that wsrep_node_incoming_address is not honoured when set in the configuration. More specifically, the setting persists in mariadb: +-----------------------------+---------------+ | Variable_name | Value | +-----------------------------+---------------+ | bind_address | 172.30.20.1 | | wsrep_node_address | 172.30.20.129 | | wsrep_node_incoming_address | 172.30.20.129 | | wsrep_sst_receive_address | 172.30.20.129 | +-----------------------------+---------------+ But the process listens on all interfaces instead: root@gal0-cn1:~# netstat -plunt | grep mysql tcp 0 0 172.30.20.1:3306 0.0.0.0:* LISTEN 17229/mysqld tcp 0 0 0.0.0.0:4567 0.0.0.0:* LISTEN 17229/mysqld Is this expected behaviour? Shouldn't mysqld only listen on 172.30.20.129:4567, as configured? Thanks! BR, George

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[Maria-discuss] Modify Global Variable "open_files_limit" not working
by c.monty＠web.de 02 Nov '18

02 Nov '18

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[Maria-discuss] adding syslog crashes container
by Paul Chubb 30 Oct '18

30 Oct '18

hi I am trying to get Mariadb to log to syslog - this is for log consolidation etc. I am using Maria in a docker container from docker hub. Other things from the container are successfully logging to syslog on my logging server but Maria isn't. If I add the word 'syslog' to a [mysqld_safe] section the configuration is not read (as reported by mysqld --print-defaults). The container init script calls mysqld rather than mysqld_safe If I change the init script to call mysqld_safe instead of mysqld, syslog is set as reported by --print-defaults however the container continually crashes after restart. If I add the word 'syslog' to [mysqld] the configuration is read however after restart, mariadb continually crashes - at least the container does. I have checked for log-error statements, when checking global vars log_error is empty and it is not reported on the print-defaults output. If I setup to log to a file, this works fine. The container is running Ubuntu 18.04 Mariadb version is 10.3.10 rsyslog version is kinetic 8.32.0 Not sure what you want to see to help me, advise and I will do my best to give it to you. Cheers paul

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[Maria-discuss] Secure replication with mariadb
by Danishka Navin 26 Oct '18

26 Oct '18

Hi Team, I am working on deploying moodle (using mariadb) in over 1000 centers and connect each remote center with central server. Each remote center has no identical data as users are totally different. (But same type of data across these 1000 remote center nodes). We can not gurrenty the connectivity between remote server and centralized server in all 1000 nodes (some of the remote servers may have connectivity issues but we need to recover all data once the connectivity establish). Is it possible to replicate each remote server in to single central server over TLS? or do we have better solution? Regards, Danishka

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[Maria-discuss] My Solution to MariaDB Database Server Crashed in Experimental Online Store
by Turritopsis Dohrnii Teo En Ming 23 Oct '18

23 Oct '18

Good evening from Singapore, Here is my solution: # systemctl start mariadb.service # mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.60-MariaDB MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> quit Bye # systemctl enable mariadb.service ===BEGIN SIGNATURE=== Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017 [1] https://tdtemcerts.wordpress.com/ [2] http://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming ===END SIGNATURE===

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[Maria-discuss] aws key management plugin
by Paul Chubb 19 Oct '18

19 Oct '18

Hi, on the repo there only seems to be copies of this for Ubuntu yacketty (16.10) and Ubuntu zesty (17.04). Both of these are end of life. Is there supposed to be support for Bionic (18.04)? Secondly, they are tagged with the mariadb version number. Are they supposed to work across versions because not every version of Mariadb is represented? Thirdly is there any reason I can't pull the code from Gidhub and compile it myself? Many thanks in advance Paul

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[Maria-discuss] help
by Paul Chubb 18 Oct '18

18 Oct '18

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[Maria-discuss] gtid_slave_pos row count
by Reinis Rozitis 15 Oct '18

15 Oct '18

Hi, before considering this as a bug wanted to ask in mailing list: I know that gtid_slave_pos table can have multiple entries, but (at least on 10.3.9 but maybe also earlier (just noticed now)) while running: slave_parallel_threads = 20 slave_parallel_mode = optimistic the table starts to grow continuously: MariaDB [mysql]> select count(*) from gtid_slave_pos; +----------+ | count(*) | +----------+ | 5577268 | +----------+ 1 row in set (1.553 sec) If I switch back to conservative mode it never goes above 2-3 rows even with the same 20 threads. Same happens also with gtid_pos_auto_engines - when in conservative each engine table has several records, once I switch to optimistic the gtid tables just grow. Is there something wrong with the purger? (something similar like in https://jira.mariadb.org/browse/MDEV-12147 ? ) rr

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[Maria-discuss] MariaDB 10.3 and largepages on Linux
by Kenneth Penza 12 Oct '18

12 Oct '18

Good morning, I am currently running RHEL 7.5 and MariaDB 10.3.9. After setting "large_pages=on" I noticed that MariaDB is reporting an error on startup and shutdown as per below output. To use large pages I modified /etc/sysctl.conf, /etc/security/limits.conf and the systemd unit file. By monitoring /proc/meminfo I verified that largepage are being used. Configuration: mysqld would have been started with the following arguments: --port=3306 --socket=/var/lib/mysql/mysql.sock --thread_stack=256K --large_pages=on --key_buffer_size=16K --max_allowed_packet=512M --table_open_cache=32 --sort_buffer_size=512K --net_buffer_length=8K --read_buffer_size=256K --read_rnd_buffer_size=256K --slow_query_log=1 --slow_query_log_file=mysql-slow.log --long_query_time=0.1 --log-queries-not-using-indexes=on --thread_handling=pool-of-threads --thread_pool_idle_timeout=60 --thread_pool_max_threads=1000 --thread_pool_size=8 --innodb_buffer_pool_size=256M --innodb_strict_mode=1 --innodb_file_per_table=1 --innodb_flush_method=O_DIRECT --innodb_log_files_in_group=4 --innodb_log_file_size=50331648 --innodb_undo_logs=128 --innodb_undo_tablespaces=8 --slow_query_log=1 --slow_query_log_file=mysql-slow.log --long_query_time=30 --log-queries-not-using-indexes=off --log_bin=mariadblog --binlog_format=ROW --binlog_row_image=MINIMAL --max_binlog_size=10240000 --expire_logs_days=1 --server-id=1 --innodb_flush_log_at_trx_commit=1 --sync_binlog=1 --relay-log=mariadb-relay-bin --performance_schema=off --histogram_size=255 --histogram_type=SINGLE_PREC_HB --use_stat_tables=preferably --optimizer_use_condition_selectivity=4 Startup messages: Sep 25 10:40:53 srv1 mysqld: 2018-09-25 10:40:52 0 [Note] InnoDB: Opened 8 undo tablespaces Sep 25 10:40:53 srv1 mysqld: 2018-09-25 10:40:53 0 [Warning] InnoDB: Failed to set memory to DODUMP: Invalid argument ptr 0x2aaac5400000 size 2097152 Sep 25 10:40:53 srv1 mysqld: 2018-09-25 10:40:53 0 [Note] InnoDB: 128 out of 128 rollback segments in 8 undo tablespaces are active. Shutdown messages: Sep 25 10:41:18 srv1 mysqld: 2018-09-25 10:41:18 0 [Note] InnoDB: Buffer pool(s) dump completed at 180925 10:41:18 Sep 25 10:41:19 srv1 mysqld: 2018-09-25 10:41:19 0 [Warning] InnoDB: Failed to set memory to DODUMP: Invalid argument ptr 0x2aaac3400000 size 33554432 Sep 25 10:41:19 srv1 mysqld: 2018-09-25 10:41:19 0 [Note] InnoDB: Shutdown completed; log sequence number 1522725; transaction id 22 Do you have ideas on what is causing "InnoDB: Failed to set memory to DODUMP: Invalid argument ptr .. " warning? Kenneth

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[Maria-discuss] CONC-312; caching_sha2_plugin
by Michal Schorm 02 Oct '18

02 Oct '18

Hello, Can I get some explanation, why was https://jira.mariadb.org/browse/CONC-312 closed as WON'T FIX ? -- MySQL 8.0 implemented "caching_sha2_password" as its default authentification plugin / method. MariaDB doesn't have support for it so mariadb-connector-c cannot be used for MySQL 8. That makes problems for nearly every Linux OS, beacuse they chose MariaDB over MySQL as the default implemetation. I'd like to know the MariaDB stance to it. Do you see it as an issue as well? Are there any plans to deal with it? How? Michal Schorm -- Michal Schorm Associate Software Engineer Core Services - Databases Team Red Hat

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