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[Maria-discuss] R: MariaDb tablespaces?
by Federico Razzoli 18 Apr '16

18 Apr '16

Hi, In current MariaDB versions, InnoDB has 2 types of tablespaces: * system tablespace * per-table tablespace There is a variable called innodb_file_per_table, you can change it at runtime. When a new table is created with innodb_file_per_table=1, the table has its own tablespace (an .ibd file in the database directory, which contains both data and indexes). When a table is created while innodb_file_per_table=0, it is written into the system tablespace. The system tablespace also contains other information, like the InnoDB data dictionary, un logs, etc. I see no particular advantage in creating new tables into the system tablespace - I consider it a feature inherited from old versions, when there were no alternatives. Remembers that the system tablespace never shrinks, even if you drop a table. Also, when using a dedicated tablespace, you can decide where the new table will be placed (see CREATE TABLE options). And you can backup only some tables, if you want to. This also enables table compression and encryption. In MySQL 5.7, you can group multiple tables into one tablespace - which means, not necessarily the system tablespace. From what I see in this page, I think (and hope) and this feature will also be in MariaDB 10.2: https://mariadb.com/kb/en/mariadb/plans-for-10x/ Other storage engines don't have tablespaces: a table is stored in a file (or in 2 files, if data and indexes are stored separately). Regards, Federico -------------------------------------------- Lun 18/4/16, Ghazi Btissam <btissam.ghazi(a)gmail.com> ha scritto: Oggetto: [Maria-discuss] MariaDb tablespaces? A: maria-discuss(a)lists.launchpad.net Data: Lunedì 18 Aprile 2016, 12:38 Hi, Is there tablespace in MariaDb like Oracle?if yes which storage engine use them and how? Thanks -----Segue allegato----- _______________________________________________ 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

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[Maria-discuss] New Question: when archive can support index to speed up select peformance?
by AskMonty KB 17 Apr '16

17 Apr '16

Hello, A new question has been asked in "Archive" by yixuan_huang. Please answer it at http://mariadb.com/kb/en/when-archive-can-support-index-to-speed-up-select-… as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hello, when i used innodb, w/o index it will cost 2 mins for select, w/ index (two columns), it only costs 20 secs. due to large size of innodb, i convert innodb to archive engine, it save space lots, but failed to create index. previously, i want to extend primary key with those two columns, but failed due to max length should be 8 bytes. any suggestions? thanks! -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/when-archive-can-support-index-to-speed-up-select-…

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[Maria-discuss] mariadb and ssl setup, but how ?
by Benny Pedersen 16 Apr '16

16 Apr '16

i like to have ssl on mariadb in global not just pr user, but i dont find much dokumention on how to setup this using gentoo here, so if its covered somewhere let me know where i search future info on this

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[Maria-discuss] Can't find log after Galera's SST
by Igor Mazur 14 Apr '16

14 Apr '16

Hi, Almost everytime when I join node to Galera cluster (MariaDB 10.1.13) I'm getting an error after SST: 2016-04-13 21:09:37 139932281419712 [Note] Recovering after a crash using /var/log/mysql/mariadb-bin 2016-04-13 21:09:37 139932281419712 [ERROR] Binlog file '/var/log/mysql/mariadb-bin.000023' not found in binlog index, needed for recovery. Aborting. 2016-04-13 21:09:37 139932281419712 [ERROR] Crash recovery failed. Either correct the problem (if it's, for example, out of memory error) and restart, or delete (or rename) binary log and start mysqld with --tc-heuristic-recover={commit|rollback} 2016-04-13 21:09:37 139932281419712 [ERROR] Can't init tc log 2016-04-13 21:09:37 139932281419712 [ERROR] Aborting As I see, almost every SST rotates a log file and downloads last (in example above I have mariadb-bin.000024), and not previous. But for recovering it needs previous. Sometimes I'm lucky and it restores. Anyone knows why it rotates a log and is it possible to force it to load more than last log file? Igor Mazur

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[Maria-discuss] mariadb/contrib?
by Colin Charles 13 Apr '16

13 Apr '16

Hi, I was speaking to Hartmut a few days ago and he mentioned that he really did like the idea of postgresql’s /contrib feature. From postgresql/contrib: This subtree contains porting tools, analysis utilities, and plug-in features that are not part of the core PostgreSQL system, mainly because they address a limited audience or are too experimental to be part of the main source tree. This does not preclude their usefulness. (https://github.com/postgres/postgres/tree/master/contrib) Should we consider doing this for MariaDB Server? Have more tools that people might benefit from, but not spend much time on it? Just a thought cheers, -colin -- Colin Charles, http://bytebot.net/blog/ twitter: @bytebot | skype: colincharles "First they ignore you, then they laugh at you, then they fight you, then you win." -- Mohandas Gandhi

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[Maria-discuss] New Question: MariaDB Hardware requirements
by AskMonty KB 13 Apr '16

13 Apr '16

Hello, A new question has been asked in "MariaDB FAQ" by palash.harchandani93_43595. Please answer it at http://mariadb.com/kb/en/mariadb-hardware-requirements/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Is there any document which specifies the numeric values of minimal hardware requirements like the ram,minimum disk space occupied for tarball installation or yum installation for different mariadb products?? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mariadb-hardware-requirements/

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[Maria-discuss] Monitoring InnoDB tables?
by Erik Cederstrand 13 Apr '16

13 Apr '16

Hi list, I'm developing a fast data synchronization tool and need to monitor some tables in a customer's MariaDB (10.1) server for changes. I only have access to the server as a MariaDB client (no filesystem access). Ideally, I would keep a connection open and poll every few seconds - AFAIK, it's not possible for e.g. a stored procedure to notify a listener external to MariaDB. The tables have no 'timestamp' or other columns I can do MAX() on to check for updates. The database is used as a backend for some proprietary software, so I can't just ask the customer to add an autoincrement column. With MyISAM, I could look at UPDATE_TIME in information_schema.tables (and live with the full-second resolution) or ask the customer to "alter table t1 checksum=1;" so I can use "checksum table t1 quick;". None of these work with InnoDB, and "checksum table t1;" is too slow for large tables. I've seen suggestions to use NUM_ROWS and MODIFIED_COUNTER in information_schema.innodb_sys_tablestats, but it's unreliable for me in a number of cases, e.g. if the number of rows is the same but contents are different. Here's an example: MariaDB [test]> create table t1 (i int primary key, j int); Query OK, 0 rows affected (0.02 sec) MariaDB [test]> insert into t1 values (1, 2); Query OK, 1 row affected (0.00 sec) MariaDB [test]> select * from information_schema.innodb_sys_tablestats where name = 'test/t1'; +----------+---------+-------------------+----------+------------------+------------------+------------------+---------+-----------+ | TABLE_ID | NAME | STATS_INITIALIZED | NUM_ROWS | CLUST_INDEX_SIZE | OTHER_INDEX_SIZE | MODIFIED_COUNTER | AUTOINC | REF_COUNT | +----------+---------+-------------------+----------+------------------+------------------+------------------+---------+-----------+ | 15000 | test/t1 | Initialized | 1 | 1 | 0 | 1 | 0 | 1 | +----------+---------+-------------------+----------+------------------+------------------+------------------+---------+-----------+ 1 row in set (0.00 sec) MariaDB [test]> delete from t1; Query OK, 1 row affected (0.00 sec) MariaDB [test]> insert into t1 values (3, 4); Query OK, 1 row affected (0.00 sec) MariaDB [test]> select * from information_schema.innodb_sys_tablestats where name = 'test/t1'; +----------+---------+-------------------+----------+------------------+------------------+------------------+---------+-----------+ | TABLE_ID | NAME | STATS_INITIALIZED | NUM_ROWS | CLUST_INDEX_SIZE | OTHER_INDEX_SIZE | MODIFIED_COUNTER | AUTOINC | REF_COUNT | +----------+---------+-------------------+----------+------------------+------------------+------------------+---------+-----------+ | 15000 | test/t1 | Initialized | 1 | 1 | 0 | 1 | 0 | 1 | +----------+---------+-------------------+----------+------------------+------------------+------------------+---------+-----------+ 1 row in set (0.00 sec) How can I monitor an InnoDB table for changes efficiently? I could *possibly* convince the customer to monitor the binlog or full query log, but then I don't even know which database was changed. The server has hundreds of databases. Erik

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[Maria-discuss] R: mariadb/contrib?
by Federico Razzoli 13 Apr '16

13 Apr '16

I would really appreciate. I believe that some great tools exist but are not used because are not in a default MariaDB/MySQL installation. A contrib directory could advertise good tools and encourage people to try them. Regards Federico -------------------------------------------- Mar 12/4/16, Colin Charles <byte(a)aeon.com.my> ha scritto: Oggetto: [Maria-discuss] mariadb/contrib? A: "Maria Discuss" <maria-discuss(a)lists.launchpad.net> Data: Martedì 12 Aprile 2016, 16:55 Hi, I was speaking to Hartmut a few days ago and he mentioned that he really did like the idea of postgresql’s /contrib feature. From postgresql/contrib: This subtree contains porting tools, analysis utilities, and plug-in features that are not part of the core PostgreSQL system, mainly because they address a limited audience or are too experimental to be part of the main source tree. This does not preclude their usefulness. (https://github.com/postgres/postgres/tree/master/contrib) Should we consider doing this for MariaDB Server? Have more tools that people might benefit from, but not spend much time on it? Just a thought cheers, -colin -- Colin Charles, http://bytebot.net/blog/ twitter: @bytebot | skype: colincharles "First they ignore you, then they laugh at you, then they fight you, then you win." -- Mohandas Gandhi -----Segue allegato----- _______________________________________________ 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

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[Maria-discuss] New Question: MariaDB Quarterly patch schedules with all Bug Fixes availability
by AskMonty KB 12 Apr '16

12 Apr '16

Hello, A new question has been asked in "MariaDB Community" by Nagaraj B. Please answer it at http://mariadb.com/kb/en/mariadb-quarterly-patch-schedules-with-all-bug-fix… as the person asking the question may not be subscribed to the mailing list. -------------------------------- Will there be a Quarterly or half yearly release of Mariadb Patches, which includes all the fixes for a quarter. Is there a pre scheduled release dates for the same. -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mariadb-quarterly-patch-schedules-with-all-bug-fix…

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[Maria-discuss] New Question: Fresh Installation of Mariadb
by AskMonty KB 09 Apr '16

09 Apr '16

Hello, A new question has been asked in "MariaDB Binary Packages" by francis_adekunle_45706. Please answer it at http://mariadb.com/kb/en/fresh-installation-of-mariadb/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- We are in the process of setting up our Developments env on Cloud Foundry and Mariadb is the DB of choice. I have Oracle background. I m trying to download and install the Mariadb software binaries as well as setup the database in our development environment. OS is RHEL 6.5 and I tried to use yum to install but got error message. I also obtain the tar.zip file and uncompressed the file on the linux server but most of the files are zero bytes.. Questions: a) What binaries do I need to download for Mariadb installation? b) What OS username and group id etc..would I be installing Mariadb as? c) Where do I get Mariadb files to download since I m having issue with yum.. I m trying to get a Maria db book but need the above basic info to get started. -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/fresh-installation-of-mariadb/

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