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5 things MySql
This document summarizes 5 key things to know about MySQL if you don't have a dedicated database administrator (DBA). It covers MySQL versions, storage engines and locking, backups, scaling options, and free tools for monitoring and troubleshooting MySQL.
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5 things MySql
- 1. 5 things youneed to know about MySQL (if you don’t have a DBA) sarah novotny – [email_address] MySQL and LAMP services www .BlueGecko . net
- 2. changing ecosystem versionsstorage engines and locking backups scaling free tools www .BlueGecko . net
- 3. changing ecosystem MySQL-> Sun -> Oracle Monty Program AB OpenDB Alliance www .BlueGecko . net
- 4.
- 5. versions 5.0 –stable. (do i need to say more?) 5.1 – fresh feature set – many open bugs – partitioning – row base replication – mysqlslap 5.4 – 5.1 ++ google patches – scalability improvements -> multicore – enhanced monitoring / diagnostic – sane defaults for my.cnf out of the box www .BlueGecko . net
- 6.
- 7. a short diversionfrom High Performance MySQL 2 nd Edition (HPM2e) -Baron Schwartz, Peter Zaitsev, Vadim Tkachenko, and Jeremy Zawodny (don’t mistake 1 st Edition for 2 nd. 1 st is dangerously out of date unless you’re running version 4.0) www .BlueGecko . net
- 8. storage engines innodbmyisam merge blackhole archive federated www .BlueGecko . net
- 9. and locking innodbmyisam www .BlueGecko . net
- 10. and locking www.BlueGecko . net
- 11. backups take themand test a restore www .BlueGecko . net
- 12. backups mysqldump isnot always a valid backup replication is easiest (and it gets you a warm standby) InnoDB hot backup XtraBackup mylvmbackup www .BlueGecko . net
- 13.
- 14. scale when it’stime to go big, what are the options? separate reads from writes www .BlueGecko . net
- 15. scale write 1/ read many partitioning / sharding multimaster / rings memcached wafflegrid www .BlueGecko . net
- 16. another short diversionto swap or not to swap that is the question www .BlueGecko . net
- 17. free tools Innotopmaatkit MySQL proxy monitoring/trending cacti templates $monitoring_server – the one you know www .BlueGecko . net
- 18. additional resources irc.freenode.org#mysql #maatkit mysql.com HPM2e - Baron Schwartz, Peter Zaitsev, Vadim Tkachenko, and Jeremy Zawodny www .BlueGecko . net
- 19. credits flickr Make:biosphere - kevino MySQL mints - jimwinstead 5 – losmininos storage- shuttercat7 clones - adactio Bell Labs - sodapop81 License plate - severud tools – meanestindian console - hermzz other swap image http://www.vocw.edu.vn/content/m10106/latest/ special thanks to mike hamrick for suggestions on content and slides www .BlueGecko . net
- 20. Blue Gecko andcontact info [email_address] [email_address] @sarahnovotny @bluegeckodba senk on #mysql www .BlueGecko . net Blue Gecko provides Remote DBA services for companies around the world 7x24x365 support including monitoring, performance analysis, proactive maintenance and architectural guidance for small and large datasets.
Editor's Notes
- #4 Not locked into proprietary space… many options. Based from the same code tree Lib mysql vs lib drizzle – licensing gotcha libmysql gpl libdrizz bsd drizzle Maria Our delta Google patches Percona xtradb
- #6 Google patches include a better malloc And completely changed locking
- #7 Choose 5.1 or 5.4 only if you need the featuresets.
- #9 •❑ inno - row with exception •❑ myi - table -- fast in some cases and search cases ( fast inserts? without lock )•❑federated - replication not multiple master. •❑ blackhole handy for logging without inserting into db or skipping a db for fake muliple master
- #10 Much performance pain come into play with lock contention
- #11 Much performance pain come into play with lock contention Names changed to protect the innocent
- #12 Understand MTR and see if you meet that goal. tarball /dump / cpio not a valid backup
- #13 •❑ tarball /dump / cpio not a valid backup •❑ replication•❑innohot•❑lvm backup script... lvmbackup? •❑ mysqldump = 100% inno ok. single transaction .•❑xtrabackup -- free innohot
- #14 LVM and slaves give easy opportunities for creating clones for testing
- #15 Begin with having your application understand that reads and writes are different
- #16 API SHOULD KNOW THE DIFF proxy as an option if API not possible. scale writes. write own interfaces? check on it. btree index larger than memory -- writes get _slow_ Memcached – good for short lived data and caching wafflegrid -- patches to mysql -- innodb bufferpool over memcached
- #17 If you’re worried about swapping, use huge page support for mysql (linux doesn’t swap out huge pages
- #18 •❑ disk•❑memory•❑up/down•❑cachehit -- baseline defiinition•❑replication •❑ mktablesync•❑mkchecksum