how to monitor mysql
TRANSCRIPT
obviously ;-)
WhenProcess_count (/usr/sbin/mysqld)
!= 1alert
● Load● CPU● Memory● Swap● Network
● Read/Write requests● IO queue length● Average IO wait● Average R/W time● Read/Write bandwidth
Is MySQL available?
● Uptime● Threads_connected● Connection usage %● Aborted_connects
Typical points of failure:
● Errors in mysql.log● Are logs being rotated?● Deleted files with FD still open?● Enough disk space?
Are queries actually being run?
● Questions/s● Queries/s● Read/Writes● Commands
The bad queries (not necessarily):
● Slow_queries● Select_full_join● Created_tmp_disk_tables● Full table scans
Caches, buffers and locks:
● Innodb_row_lock_waits● Innodb_buffer_pool_wait_free● Open_tables● Long running transactions● Deadlocks
$ mysql$ mysqladmin$ innotop$ mysqlreport
Percona Monitoring Plugins
● Nagios, Cacti, Zabbix● can be used as CLI tools together
with Percona Toolkit
