Munin plugin for showing graphs of MySQL resource usage.
- Download zip file from Github and unzip (https://github.com/meersjo/munin-mysql/archive/master.zip)
- Install dependencies
- munin-node
- Perl modules: DBI, DBD::mysql, Module::Pluggable
- Edit Makefile
- Edit mysql.conf
- Run `make install'
The plugin documentation is contained in the plugin file as POD. View it with perldoc.
The SchemaSize plugin performs a pretty heavy query on information_schema.tables. Careful when using this on a large environment. Since it is SLOW, you may also need to set timeout in the plugin config. See http://munin-monitoring.org/wiki/plugin-conf.d On 5.1.17+, there's a DIRTY HACK in the code that speeds it up for InnoDB tables. Should have zero impact, but you may still want to read the official documentation on the setting: http://dev.mysql.com/doc/refman/5.1/en/innodb-parameters.html#sysvar_innodb_stats_on_metadata
I don't have a lower version to test on, but it should simply pass the hack and work slowly.
There is a blog post with some general information and screenshots at http://oierud.name/bliki/ImprovedMuninGraphsForMySQL.html
The information on http://code.google.com/p/mysql-cacti-templates/wiki/MySQLTemplates should be relevant (As these munin graphs are heavily inspired by Xaprb's cacti graphs.)
There is a wiki at https://github.com/kjellm/munin-mysql/wiki
The source is hosted at github: http://github.com/meersjo/munin-mysql/
-
If you get warnings saying "Output from SHOW ENGINE INNODB STATUS was truncated" that means that a very large deadlock are causing the output to be truncated. The consequence is that data for many of the InnoDB related data sources will be missing. For solutions to this problem see http://www.xaprb.com/blog/2006/08/08/how-to-deliberately-cause-a-deadlock-in-mysql/
-
You can find some tips for debugging munin plugin problems here: http://munin.projects.linpro.no/wiki/Debugging_Munin_plugins
-
Bugs should be reported to the issue tracker on github http://github.com/meersjo/munin-mysql/issues
Johan De Meersman <vegivamp AT tuxera DOT be>
Blatantly stolen, I mean forked off the code by Kjell-Magne Øierud <kjellm AT oierud DOT net>
Inspired by the cacti graphs made by Xaprb http://code.google.com/p/mysql-cacti-templates/ as viewed on http://www.xaprb.com/blog/2008/05/25/screenshots-of-improved-mysql-cacti-templates/.
This plugin also contains changes from the upstream munin mysql plugin. See the list of contributors.