June 2017 - discuss - lists.mariadb.org

[Maria-discuss] why stdout? -> [Note] /usr/libexec/mysqld (mysqld 10.0.20-MariaDB) starting as process 115096
by Reindl Harald 05 Jul '20

05 Jul '20

Aug 6 12:24:24 testserver mysqld: 150806 12:24:24 [Note] /usr/libexec/mysqld (mysqld 10.0.20-MariaDB) starting as process 115096 ... why is this now stdout instead mysql logs? on systemd based distributions that spits now to the global syslog and finally on machines restarting 2 instances every hour for backup reasons it annoys until 10.0.19 or 10.0.20 that was not this way

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[Maria-discuss] Charsets and collations
by Peter Laursen 20 Apr '18

20 Apr '18

Does anybody know if there are any plans to bring collations added in MySQL 8 - refer http://mysqlserverteam.com/new-collations-in-mysql-8-0-0/ - to MariaDB and are there any plans to change the default charset to a unicode-based one? -- Peter -- Webyog

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[Maria-discuss] question about fast path for TRUNCATE TABLE
by MARK CALLAGHAN 06 Aug '17

06 Aug '17

This started as a question on a MyRocks list. MyRocks comes from MariaDB in this case and the code that determines whether the truncate table fast path is used looks different in MariaDB than in FB MySQL. By "fast path" for truncate I mean the use of drop/recreate for truncate. The slow path is delete one row at a time. In this case, truncate is doing delete one row at a time for MyRocks in MariaDB but drop/recreate in FB MySQL. https://groups.google.com/forum/#!topic/myrocks-dev/dhweTwN-9xg -- Mark Callaghan mdcallag(a)gmail.com

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[Maria-discuss] legacy InnoDB compressed tables using row_format=compressed
by Lukas Lehner 05 Jul '17

05 Jul '17

Hey Quote from https://mariadb.com/kb/en/mariadb/compression/ This approach differs significantly from legacy InnoDB compressed tables using row_format=compressed, where both uncompressed and compressed pages can be in the buffer pool. Any details why this is legacy? Should not be used? With a search engine I found a very old blog posting "InnoDB compression woes" from Percona. row_format=compressed is attractive when you pay your DBaaS per GB (storage based usage). Any insides? Lukas

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[Maria-discuss] Duplication of documentation for binlog annotation and a question on replicate_annotate_row_events not being dynamic
by Jean-Francois B. Gagne 03 Jul '17

03 Jul '17

Hi all, This is a documentation organisation question and a technical question on replicate_annotate_row_events not being dynamic. In [1], we can find the documentation for the options binlog-annotate-row-events and replicate-annotate-row-events, and [2] points to [1]. However, there is a duplication of that documentation in [3] and [4], is there a reason for that (there is a risk of those 2 documentation diverging) ? [1]: https://mariadb.com/kb/en/mariadb/annotate_rows_log_event/ [2]: https://mariadb.com/kb/en/mariadb/mysqld-options/ [3]: https://mariadb.com/kb/en/mariadb/replication-and-binary-log-server-system-… [4]: https://mariadb.com/kb/en/mariadb/replication-and-binary-log-server-system-… And the technical question about replicate_annotate_row_events: this variable is not dynamic, is there a reason for that ? I understand that this variable could/should only be modifiable while the slave is stopped, but not being dynamic is not very DBA/SysAdmin/Operator friendly. Many thanks, Jean-François Gagné

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[Maria-discuss] [mysqld] Can't find messagefile '/usr/share/mysql/errmsg.sys'
by Guillermo Cespedes 30 Jun '17

30 Jun '17

Hi, Compilation Instructions: # uname -a Linux framework 3.16.0-4-686-pae #1 SMP Debian 3.16.43-2+deb8u2 (2017-06-26) i686 GNU/Linux # groupadd mysql # useradd -c "MySQL Server" -g mysql -s /bin/false mysql # cmake . -DBUILD_CONFIG=mysql_release \ -DCMAKE_C_FLAGS="-I/usr/local/include -I/usr/include/i386-linux-gnu" \ -DWITH_INNODB_LZ4=ON -DWITH_INNODB_LZMA=OFF -DWITH_INNODB_LZO=OFF \ -DWITH_ZLIB=system -DWITH_SSL=system \ -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_spanish_ci \ -DWITH_DEBUG=0 -DWITH_VALGRIND=0 # make # make install # export PATH=$PATH:/usr/local/mysql/bin # echo "export PATH=$PATH:/usr/local/mysql/bin" >> /etc/profile # source /etc/profile # cd /usr/local/mysql # chown -R root . # chown -R mysql data # cp ./support-files/my-medium.cnf /etc/my.cnf # ./scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --verbose # cp ./support-files/mysql.server /etc/init.d/mysql # chmod +x /etc/init.d/mysql # update-rc.d mysql defaults # service mysql start # ./bin/mysql_secure_installation # ./bin/mysqladmin -u root password Error: # mysqld 2017-06-28 21:37:24 3071039232 [Note] Using unique option prefix 'key_buffer' is error-prone and can break in the future. Please use the full name 'key_buffer_size' instead. 2017-06-28 21:37:24 3071039232 [Note] mysqld (mysqld 10.2.6-MariaDB-log) starting as process 2600 ... 2017-06-28 21:37:24 3071039232 [ERROR] Can't find messagefile '/usr/share/mysql/errmsg.sys' 2017-06-28 21:37:24 3071039232 [ERROR] Aborting # ls -l /usr/share/mysql ls: cannot access /usr/share/mysql: No such file or directory How to indicate the correct directory permanently ? /usr/share/mysql to /usr/local/mysql/share # ls /usr/local/mysql/share aclocal german mysql_performance_tables.sql romanian charsets greek mysql_system_tables_data.sql russian czech hungarian mysql_system_tables.sql serbian danish install_spider.sql mysql_test_data_timezone.sql slovak dutch italian mysql_to_mariadb.sql spanish english japanese norwegian swedish errmsg-utf8.txt korean norwegian-ny ukrainian estonian maria_add_gis_sp_bootstrap.sql pkgconfig fill_help_tables.sql maria_add_gis_sp.sql polish french mroonga portuguese Guillermo Céspedes Full Stack Developer

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[Maria-discuss] Parser language
by Roberto Spadim 28 Jun '17

28 Jun '17

Hi guys, sometime ago i asked if we could select what parser we are using, with an example with nosql (handler socket) or sql, without new socket connection Show we consider this as something we will need? Check that new query ideas are next door: http://probcomp.csail.mit.edu/bayesdb/ -- Roberto Spadim SPAEmpresarial - Software ERP Eng. Automação e Controle

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[Maria-discuss] MariaDB 10.2 innodb page_clean question ?
by Ljr Yang 26 Jun '17

26 Jun '17

Hi, Recently, we upgrade 8 MariaDB slaves from MariaDB 10.1.22 to MariaDB 10.2.6. In error log, it frequent occurrence some innodb Note: ............. 2017-06-26 9:01:03 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 6142ms. The settings might not be optimal. (flushed=16 and evicted =0, during the time.) 2017-06-26 9:03:54 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 4584ms. The settings might not be optimal. (flushed=8 and evicted= 0, during the time.) 2017-06-26 9:05:58 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 4728ms. The settings might not be optimal. (flushed=8 and evicted= 0, during the time.) 2017-06-26 9:08:49 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 5016ms. The settings might not be optimal. (flushed=8 and evicted= 0, during the time.) 2017-06-26 9:09:12 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 4990ms. The settings might not be optimal. (flushed=8 and evicted= 0, during the time.) 2017-06-26 9:11:27 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 5387ms. The settings might not be optimal. (flushed=8 and evicted= 0, during the time.) 2017-06-26 9:14:43 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 6463ms. The settings might not be optimal. (flushed=0 and evicted= 0, during the time.) 2017-06-26 9:16:27 140022654363392 [Note] InnoDB: page_cleaner: 1000ms intended loop took 4031ms. The settings might not be optimal. (flushed=40 and evicted =0, during the time.) ............ Now, It have not affect the normal use, but we could not confirm, it is our config problem or other reasons? Please help confirm, thanks.

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[Maria-discuss] MariaDB and Intel TSX
by Reindl Harald 25 Jun '17

25 Jun '17

does MariaDB make usage of TSX on newer hardware or at least using glibc for the query cache mutex which would implicit benfit form it? just curious because next year we replace our cluster nodes and put them in a EVC mode where TSX instrcutions are supported https://en.wikipedia.org/wiki/Transactional_Synchronization_Extensions https://www.flamingspork.com/blog/2014/06/05/performance-impact-of-mysql-qu… https://lwn.net/Articles/534758/

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[Maria-discuss] Help to compile MariaDB 10.2.6 - Debian 8.8
by Guillermo Céspedes Tabárez 23 Jun '17

23 Jun '17

Hello I need help to add in my script ( https://gist.github.com/dertin/8de14e458dd4f0d3acb5f0deff120951#file-instal… ) the compilation of "MariaDB 10.2.6" from its source code. Must work for Debian 8.8 32bit and 64bit Thank you

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