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[Maria-discuss] TokuDB + MariaDB: libjemalloc is important
by Colin Charles 23 Apr '13

23 Apr '13

Hi! Continuing on the interest in libjemalloc, and how we have a thread started on in, especially since Percona is building their server going forward using it (see: https://lists.launchpad.net/maria-discuss/msg00788.html), we've also had requests from Team Tokutek, that TokuDB also requires us building with jemalloc for a good experience. I'm adding Tim Callaghan to the discussion, as TokuDB has been building & releasing with it for over a year The other Callaghan who's on this list, Mark, has also made posts about jemalloc: https://www.facebook.com/MySQLatFacebook/posts/486784224710172 & https://www.facebook.com/notes/mysql-at-facebook/using-jemalloc-to-fix-a-pe… Shall we think about using a different malloc implementation? LD_PRELOAD may be the only option we have to change... (oh and test, benchmark, etc.) cheers, -colin -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/

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[Maria-discuss] Fedora test day for replacing MySQL with MariaDB
by Colin Charles 19 Apr '13

19 Apr '13

Hi all, By now you must know of the movement to replace MySQL with MariaDB in Fedora-land (http://fedoraproject.org/wiki/Features/ReplaceMySQLwithMariaDB). One important thing is to ensure that MariaDB is a drop-in replacement. Fedora is a fast-moving high quality Linux distribution, so their focus aims are to ensure that MariaDB and MySQL are compatible, data can be migrated easily and there are minimal/no upgrade issues (and if so, they need to be documented) This is why on 30 April 2013, there is a Fedora test day dedicated to this very important task: http://fedoraproject.org/wiki/Test_Day:2013-04-30_MariaDB I plan to be on IRC for as long as humanly possible on #fedora-test-day (freenode) and will be watching the process closely. If you would like to participate, this is naturally welcome to help new MariaDB users Thanks! cheers, -colin -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/

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[Maria-discuss] jemalloc used in Percona Server 5.5.30
by Colin Charles 13 Apr '13

13 Apr '13

Hi! Steve Meyers, a MariaDB user, is quite excited to see that libjemalloc is used for Percona Server 5.5.30 (http://www.stevemeyers.net/2013/04/percona-server-to-ship-with-jemalloc.html). He's wondering if we'll adopt this A note from the latest release notes: "Percona Server for MySQL will now be shipped with the libjemalloc library. Benchmark showing the impact of memory allocators on MySQL performance can be found in this blogpost." Blogpost: http://www.mysqlperformanceblog.com/2012/07/05/impact-of-memory-allocators-… cheers, -colin -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/

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[Maria-discuss] We're accepted into Google Summer of Code 2013
by Colin Charles 10 Apr '13

10 Apr '13

Subject says it all We need people to sign up as mentors (http://www.google-melange.com/gsoc/homepage/google/gsoc2013) against the MariaDB project Students start opening up soon If you know of projects a student can complete in 3 months over a summer, this is the ideal place to list the task: https://kb.askmonty.org/en/google-summer-of-code-2013/ This is the first time MariaDB is going to participate. Some of you have done this in the past against MySQL or Drizzle. Big win for MariaDB this year! cheers, -colin -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/

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[Maria-discuss] Google Summer of Code 2013 ideas page
by Colin Charles 09 Apr '13

09 Apr '13

Hi all, Team MariaDB wants to participate in Google Summer of Code 2013. We definitely want to ensure that students have lots to do within those three summer months plus continue being MariaDB developers Please contribute to the ideas page: https://kb.askmonty.org/en/google-summer-of-code-2013/ Thanks -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/

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[Maria-discuss] KB Question: Creating forms
by Daniel Bartholomew 08 Apr '13

08 Apr '13

The following question has been posted in the AskMonty Knowledgebase: https://kb.askmonty.org/en/creating-forms/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Creating forms I am new to MariaDB and MySQL. I am experienced with MS Access. I have an extensive Access DB that I want to convert to MariaDB. I have read MariaDB Crash Course. My question is what front-end do I use to create forms and reports? Is the best approach, use PHP or Python and create a web based application? - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thanks. -- Daniel Bartholomew Google+ - http://gplus.to/dbart Twitter - http://twitter.com/daniel_bart 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 Knowledgebase - http://kb.askmonty.org Monty Program - http://montyprogram.com

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[Maria-discuss] KB Question: Client library compatibility
by Daniel Bartholomew 04 Apr '13

04 Apr '13

The following question has been posted to the AskMonty Knowledgebase: https://kb.askmonty.org/en/client-library-compatibility/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Hi, Two questions : You mention that the MariaDB client library is compatible with MySQL 5.5. What about its actual MariaDB-versionned compatibility ? I also noted that the client library code is in active and constant development. Is it aimed at evolving at the same time as MariaDB, or will we have, as it's the case for MySQL, a client library for each new MariaDB release ? Thanks in advance, Bruno - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Thanks. -- Daniel Bartholomew Google+ - http://gplus.to/dbart Twitter - http://twitter.com/daniel_bart 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 Knowledgebase - http://kb.askmonty.org Monty Program - http://montyprogram.com

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[Maria-discuss] Single-threaded performance & optimizer overhead
by Colin Charles 03 Apr '13

03 Apr '13

Hi! Mark Callaghan asks this on Facebook: While testing single-threaded performance to compare MySQL 5.1 with 5.6 I think there is much more overhead in the optimizer in 5.6. Do you have benchmark results for a single-threaded workload with fast queries (like SELECT one row by PK from a cached table)? I am curious whether new versions of MariaDB have a similar increase in optimizer overhead. http://bugs.mysql.com/bug.php?id=68825 He also wrote a blog post: http://mysqlha.blogspot.com/2013/04/mysql-56-single-thread-update-only.html Might make a great post at our blog cheers, -colin -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/

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Re: [Maria-discuss] [Dbmail] MariaDB and dbmail
by Reindl Harald 03 Apr '13

03 Apr '13

Am 03.04.2013 11:09, schrieb Sergej Pupykin: > At Tue, 02 Apr 2013 19:47:15 +0400, > Sergej Pupykin <ml(a)sergej.pp.ru> wrote: >> Not sure if it caused by migration to mariadb, but problem appeared >> near same time. > > Downgrading back from mariadb 5.5.30 to mysql 5.5.30 solves the > problem. It looks like mariadb has ordering problems or it is not > drop-in replacement of mysql i am CC'ing this to the MariaDB list.......... but "however when I run it from command line it works well" speaks against it - this is highly interesting since more and more distributions are switching to MariaDB including Fedora and i am at preparing the switch too with no problems until now _____________________________ zamri <myzamri(a)gmail.com> wrote: > MariaDB is fully compatible with MySQL. Migration is done. So far so good. Phewww!... > > Now I need to do some research on tuning mariadb if needed. I found that after migration following SQL returns wrong sorted data: SELECT l.part_key, l.part_depth, l.part_order, l.is_header, DATE_FORMAT(ph.internal_date,GET_FORMAT(DATETIME,'ISO')), data FROM dbmail_mimeparts p JOIN dbmail_partlists l ON p.id = l.part_id JOIN dbmail_physmessage ph ON ph.id = l.physmessage_id WHERE l.physmessage_id = <ID> ORDER BY l.part_key,l.part_order ASC; however when I run it from command line it works well. Probably it does not fail always because of not all emails damaged. Not sure if it caused by migration to mariadb, but problem appeared near same time.

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Re: [Maria-discuss] [Dbmail] MariaDB and dbmail
by Sergej Pupykin 03 Apr '13

03 Apr '13

At Wed, 03 Apr 2013 14:35:59 +0400, Sergej Pupykin <ml(a)sergej.pp.ru> wrote: > > Yes, but > > $ systemctl stop postfix dbmail-imapd dbmail-timsieved dbmail-pop3d mysqld > $ pacman -S mysql-clients mysql libmysqlclient > $ systemctl start mysqld postfix dbmail-imapd dbmail-timsieved dbmail-pop3d > $ mysql_upgrade --force > > solves the problem. > > I tested it using telnet to imap port. > ? LOGIN ... > ? SELECT ... > ? FETCH <ID> body[] > and check order of mime parts. > > Also dbmail/libzdb code looks clean. It just get sql query results and > put them to IMAP client... Link to thread start: http://www.mail-archive.com/dbmail%40dbmail.org/msg18179.html

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