These Cacti templates extract and graph a huge variety of information about MySQL and other components of a LAMP application, giving you very detailed insight into your server's performance over time.
The templates and associated scripts have lots of nice features, including code to work around PHP's issues with large numbers on various platforms. There is also special code to work around Cacti's own limitations, making the templates more efficient on the systems they monitor as well as the monitoring machine itself.
You can see examples of the graphs on the wiki (see the link above).
If you need paid support, you can buy it from Percona, where the developer works. Free support is provided on the mailing list (see the link at the right.)
These templates were developed at The Rimm-Kaufman Group and released as Free Software because of their generosity.
This project has inspired several others, among them:
