March 2014 - discuss - lists.mariadb.org

[Maria-discuss] EXPLAIN and CONNECT
by Federico Razzoli 04 Jun '14

04 Jun '14

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[Maria-discuss] MariaDB subquery
by James Qian Wang 15 Apr '14

15 Apr '14

Hi All, I have a query which shows type REF when explained in MySQL 5.5/5.6. However, the same query shows type INDEX in MariaDB 10.0.9 I.e. the query is a lot slower in MariaDB. Any one has the similar experience please? Please drop me a line. -- James Qian Wang

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[Maria-discuss] InnoDB pain points
by Jan Lindström 14 Apr '14

14 Apr '14

Hi all, I would like to know the most affecting InnoDB pain points the customers/potential customers first refer. By pain point, I mean anything that causes concerns, restricts sales etc, pain point can be bug, missing feature, usage problem, performance etc. My goal on asking this question is to find out what are the real issues customers or potential customer are struggling or issues that block customers using MariaDB. After that I will see what I can do about the situation and plan forward to address the raised issues with proper priorities. Dean, if this list does to reach the support engineers and technical sales teams please forward to more suitable list. R: Jan -- Jan Lindström Principal Engineer MariaDB | MaxScale | skype: jan_p_lindstrom www.skysql.com <http://www.skysql.com/> Twitter <http://twitter.com/skysql> Blog <http://www.skysql.com/blog/> Facebook <http://www.facebook.com/skysql> LinkedIn <http://www.linkedin.com/company/1214250> Google+ <https://plus.google.com/117544963211695643458/posts>

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[Maria-discuss] Trouble getting MariaDB to start up
by Jonathan Gazeley 07 Apr '14

07 Apr '14

Hi folks, I'm reasonably experienced with MySQL and MMM for cluster management but now I am working on a project to replace this with a MariaDB Galera cluster. Basic system info: [jg4461@db3 ~]$ uname -a Linux db3.resnet.bris.ac.uk 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 25 19:59:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux [jg4461@db3 ~]$ cat /etc/redhat-release CentOS release 6.5 (Final) [jg4461@db3 ~]$ mysql -V mysql Ver 15.1 Distrib 5.5.36-MariaDB, for Linux (x86_64) using readline 5.1 I've set up a Galera prototype with two nodes and I got the clustering working. Then I decided to add a load of config options from my old MySQL install to the MariaDB install, and now it fails to start up, but doesn't give an obvious error message. The options were mostly to do with InnoDB buffers etc. This is the output in the log file /var/lib/mysql/db3.resnet.bris.ac.uk.err, the init script hangs for ages after this without giving any further output. 140331 15:07:49 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 140331 15:07:49 mysqld_safe WSREP: Running position recovery with --log_error='/var/lib/mysql/wsrep_recovery.mlbT89' --pid-file='/var/lib/mysql/db3.resnet.bris.ac.uk-recover.pid' 140331 15:07:51 mysqld_safe WSREP: Failed to recover position: '140331 15:07:49 InnoDB: The InnoDB memory heap is disabled 140331 15:07:49 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140331 15:07:49 InnoDB: Compressed tables use zlib 1.2.3 140331 15:07:49 InnoDB: Using Linux native AIO 140331 15:07:49 InnoDB: Initializing buffer pool, size = 1.5G 140331 15:07:49 InnoDB: Completed initialization of buffer pool 140331 15:07:49 InnoDB: highest supported file format is Barracuda. InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 140331 15:07:49 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files... InnoDB: Restoring possible half-written data pages from the doublewrite InnoDB: buffer... 140331 15:07:49 InnoDB: Waiting for the background threads to start 140331 15:07:50 Percona XtraDB (http://www.percona.com) 5.5.36-MariaDB-33.0 started; log sequence number 1607692 140331 15:07:50 [Note] Plugin 'FEEDBACK' is disabled.' My MariaDB config file is attached. Please could someone point me in the right direction of where to go with debugging this. I can't find any other error message so I'm struggling to track down why the server can't start. Any advice gratefully accepted! Thanks, Jonathan

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[Maria-discuss] MariaDB 10.0.10 now available
by Daniel Bartholomew 31 Mar '14

31 Mar '14

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.0.10. This is a Stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 10.0.10 - Release Notes: https://mariadb.com/kb/en/mariadb-10010-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-10010-changelog - Downloads: https://downloads.mariadb.org/mariadb/10.0.10 About MariaDB 10.0: - https://mariadb.com/kb/en/what-is-mariadb-100/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB & MySQL community event, 3 Apr 2014 - - - - - - - - - - - The MariaDB Foundation is holding a community event to complement the Percona Live conference and expo in Santa Clara, CA. The event is free. Visit the Community Events page on mariadb.org for full details, including the speaker schedule and to register. - https://mariadb.org/en/community-events/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - SkySQL has held several MariaDB-focused Webinars recently which are available on an on-demand basis at: - http://www.skysql.com/why-skysql/webinars/ They are also planning several more MariaDB-focused webinars that will be held over the comming months. Details available at the above link. - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - The newly published MariaDB Cookbook contains nearly 100 recipes covering a variety of features in MariaDB. - http://www.packtpub.com/exclusive-and-unique-features-of-mariadb/book Another book, Getting Started with MariaDB is a how-to guide for beginners to help them get up to speed quickly with MariaDB. No prior database experience required. - http://www.packtpub.com/getting-started-with-mariadb/book - - 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://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ - http://www.cafepress.com/mariadb We hope you enjoy MariaDB! -- MariaDB: An Enhanced Drop-in Replacement for MySQL Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] New Question: MariaDB wire protocol
by AskMonty KB 31 Mar '14

31 Mar '14

Hello, A new question has been asked in "MariaDB Documentation" by steveteale: -------------------------------- Where is the wire protocol described please. -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mariadb-wire-protocol/

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[Maria-discuss] bugs in the testsuite
by Reindl Harald 31 Mar '14

31 Mar '14

hi, i see the errors below for a longer time and thought i should mention them - in case of running the test-suite completly alone i would not expect that /usr/bin/su -c 'cd /usr/share/mysql-test; ./mysql-test-run.pl --default-myisam --parallel=1 --max-test-fail=0 --mysqld=--binlog-format=mixed --skip-ndb --force' mysql ________________________________________________- rpl.rpl_row_utf32 'row' [ fail ] Test ended at 2014-03-05 19:57:46 CURRENT_TEST: rpl.rpl_row_utf32 mysqltest: In included file "./include/rpl_init.inc": included from ./include/master-slave.inc at line 38: included from /usr/share/mysql-test/suite/rpl/t/rpl_row_utf32.test at line 2: At line 179: query 'RESET SLAVE' failed: 1198: This operation cannot be performed with a running slave; run STOP SLAVE first The result from queries just before the failure was: include/master-slave.inc - saving '/usr/share/mysql-test/var/log/rpl.rpl_row_utf32-row/' to '/usr/share/mysql-test/var/log/rpl.rpl_row_utf32-row/' rpl.rpl_row_view01 'row' [ skipped ] Not ROW format rpl.rpl_row_wide_table 'row' [ skipped ] Not ROW format rpl.rpl_tmp_table_and_DDL 'row' [ fail ] Test ended at 2014-03-05 19:57:50 CURRENT_TEST: rpl.rpl_tmp_table_and_DDL mysqltest: In included file "./include/rpl_init.inc": included from ./include/master-slave.inc at line 38: included from /usr/share/mysql-test/suite/rpl/t/rpl_tmp_table_and_DDL.test at line 8: At line 179: query 'RESET SLAVE' failed: 1198: This operation cannot be performed with a running slave; run STOP SLAVE first The result from queries just before the failure was: include/master-slave.inc - saving '/usr/share/mysql-test/var/log/rpl.rpl_tmp_table_and_DDL-row/' to '/usr/share/mysql-test/var/log/rpl.rpl_tmp_table_and_DDL-row/' rpl.semisync_memleak_4066 'row' [ skipped ] Need semisync plugins rpl.rpl_stm_sql_mode 'stmt' [ fail ] Test ended at 2014-03-05 19:58:31 CURRENT_TEST: rpl.rpl_stm_sql_mode mysqltest: In included file "./include/rpl_init.inc": included from ./include/master-slave.inc at line 38: included from /usr/share/mysql-test/suite/rpl/t/rpl_stm_sql_mode.test at line 2: At line 179: query 'RESET SLAVE' failed: 1198: This operation cannot be performed with a running slave; run STOP SLAVE first The result from queries just before the failure was: include/master-slave.inc - saving '/usr/share/mysql-test/var/log/rpl.rpl_stm_sql_mode-stmt/' to '/usr/share/mysql-test/var/log/rpl.rpl_stm_sql_mode-stmt/'

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[Maria-discuss] New Question: Multi Master Replication
by AskMonty KB 27 Mar '14

27 Mar '14

Hello, A new question has been asked in "MariaDB Documentation" by eddow: -------------------------------- Greetings, I am attempting to set up Multi Master Replication. So far, I have been able to set up multiple masters and data is replicated to one slave. This works great. What I am having a problem with is if I add a new master. When I add the master the data in the slave table is truncated and only the data from the new master is replicated. I loose all my old data in the slave. Example: Master 1300: +----------------+ | name | +----------------+ t1300 Master 13: +----------------+ | name | +----------------+ t13 +----------------+ Slave: +----------------+ | name | +----------------+ t1300 t13 +----------------+ On the slave I do this: change master 't68' to master_host='10.79.84.149', master_user='replication_user', master_port=3306; start slave t1300; select * from name; Slave: +----------------+ | name | +----------------+ t68 +----------------+ -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/multi-master-replication/

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[Maria-discuss] Does ADD/DROP INDEX update the InnoDB buffer pool?
by Markus "Shorty" Uckelmann 25 Mar '14

25 Mar '14

Hi all, When adding or dropping a primary and/or secondary index is the InnoDB buffer pool updated too? Is the pool changed in place or will the LRU algo just evict to make room? In the second case buffers of other tables on the server might be affected too and the server would run with a more or less cold buffer pool. We have to fiddle with indices on production servers, which by itself is a precarious matter. So I tried to find out how ADD/DROP INDEX operations affect the memory/buffer pool of our servers. Since I wasn't able (or too stupid) to find something about this topic it would be great if someone could help me out and point me in the right direction. BTW: Version is MariaDB 5.5 Cheers, Shorty

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[Maria-discuss] New Question: can't get mariadb to start in Slackware
by AskMonty KB 25 Mar '14

25 Mar '14

Hello, A new question has been asked in "MariaDB community" by boomhower182: -------------------------------- After my fresh install it was starting just fine and the only thing I changed was my apache config files to get php to work and then I did some updates and it was still working, then all of a sudden it stopped working. this is what my .err file states.. 140324 16:49:05 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 140324 16:49:05 InnoDB: The InnoDB memory heap is disabled 140324 16:49:05 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140324 16:49:05 InnoDB: Compressed tables use zlib 1.2.8 140324 16:49:05 InnoDB: Using Linux native AIO 140324 16:49:05 InnoDB: Initializing buffer pool, size = 128.0M 140324 16:49:05 InnoDB: Completed initialization of buffer pool 140324 16:49:05 InnoDB: highest supported file format is Barracuda. InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 140324 16:49:05 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files... InnoDB: Restoring possible half-written data pages from the doublewrite InnoDB: buffer... 140324 16:49:05 InnoDB: Waiting for the background threads to start 140324 16:49:06 Percona XtraDB (http://www.percona.com) 5.5.35-MariaDB-33.0 started; log sequence number 1597945 140324 16:49:06 [Note] Plugin 'FEEDBACK' is disabled. 140324 16:49:06 [ERROR] mysqld: Can't find file: './mysql/plugin.frm' (errno: 13) 140324 16:49:06 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 140324 16:49:06 [ERROR] mysqld: Can't find file: './mysql/host.frm' (errno: 13) 140324 16:49:06 [ERROR] Fatal error: Can't open and lock privilege tables: Can't find file: './mysql/host.frm' (errno: 13) 140324 16:49:06 mysqld_safe mysqld from pid file /var/run/mysql/mysql.pid ended -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/cant-get-mariadb-to-start-in-slackware/

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