Hi list,
i wrote a plugin for the Nagios monitoring system which allows you to check
some performance related aspects of a MySQL database.
The -m option tells the plugin the desired mode. Possible keywords are:
slave-lag (Check 'Seconds behind master')
slave-io-running (Check for 'Slave io running: Yes')
slave-sql-running (Check for 'Slave sql running: Yes')
threads-connected (Check 'Threads connected')
threadcache-hitrate (Check 'Thread cache hitrate')
querycache-hitrate (Check 'Query cache hitrate')
keycache-hitrate (Check 'MyISAM Key cache hitrate')
bufferpool-hitrate (Check 'InnoDB Buffer pool hitrate')
tablecache-hitrate (Check 'Table cache hitrate')
table-lock-contention (Check 'Table lock contention')
temp-disk-tables (Check 'Percent of temp tables created on disk')
connection-time (Check 'Seconds to get a connection')
slow-queries (Check 'Slow queries'*)
qcache-lowmem-prunes (Check 'Query cache entries pruned because of low
memory'*)
bufferpool-wait-free (Check 'InnoDB Buffer pool waits for clean page
available'*)
log-waits (Check 'InnoDB log waits because of a too small
log buffer'*)
Example:
check_mysql_perf -m qcache-hitrate
OK - Query Cache Hitrate at 93.93%|qcache_hitrate=93.93%;90:;80:
check_mysql_perf -m qcache-hitrate -w 95: -c 90:
WARNING - Query Cache Hitrate at 93.93%|qcache_hitrate=93.93%;95:;90:
Please take into account that you need also the nagios-plugins package (i
recommend 1.4.11) for a successful build.
The steps are:
- tar zxvf nagios-plugins-1.4.11.tar.gz
- cd nagios-plugins-1.4.11; ./configure; make
- cd ..
- tar zxvf check_mysql-perf-1.1.tar.gz
- cd check_mysql-perf-1.1
- ./configure --with-officialplugins=/absolute/path/to/nagios-plugins-1.4.11
- make
Of course a mysql-dev installation has to be found (or provided with
--with-mysql) either in step 2 or step 6.
You can find more documentation and the download link at
http://www.consol.com/opensource/nagios/check-mysql-perf
or if you like the german language
http://www.consol.de/opensource/nagios/check-mysql-perf
Greetings from Munich,
Gerhard
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