Nagios 2 Cacti, N2Cacti, is a project derived from N2RRD. N2cacti will parse Nagios Configuration, read N2RRD configuration (modified version homemade) and will configure Cacti to create a Graph by Nagios Services.

Grapher's collector of Nagios 3 performance data

This project offers two things: # Improved Cacti templates for various systems. They graph a huge variety of information, giving you very detailed insight into your server's performance over time. You can follow these links to see documentation and examples of [MySQLTemplates MySQL, InnoDB], ...