How to Monitor MySQL
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How to Monitor MySQL, MariaDB or Percona, choosing the right metrics & alerts. Read more on https://blog.serverdensity.com/how-to-monitor-mysql/
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How to Monitor MySQL
- 1. Jorge Salamero Sanz <jsalamero@serverdensity.com> 29 October 2015
- 5. ● Load ● CPU ● Memory ● Swap ● Network ● Read/Write requests ● IO queue length ● Average IO wait ● Average R/W time ● Read/Write bandwidth
- 6. Is MySQL available? ● Uptime ● Threads_connected ● Connection usage % ● Aborted_connects
- 7. Typical points of failure: ● Errors in mysql.log ● Are logs being rotated? ● Deleted files with FD still open? ● Enough disk space?
- 8. Are queries actually being run? ● Questions/s ● Queries/s ● Read/Writes ● Commands
- 9. The bad queries (not necessarily): ● Slow_queries ● Select_full_join ● Created_tmp_disk_tables ● Full table scans
- 10. Caches, buffers and locks: ● Innodb_row_lock_waits ● Innodb_buffer_pool_wait_free ● Open_tables ● Long running transactions ● Deadlocks
- 11. $ mysql $ mysqladmin $ innotop $ mysqlreport
- 12. Percona Monitoring Plugins ● Nagios, Cacti, Zabbix ● can be used as CLI tools together with Percona Toolkit