I know I’ve mentioned how much I love the sysstat package before. I use sar regularly to help with performance diagnostics (Analyzing Linux System Performance And Finding Bottle NecksCPU Performance Analysis In LinuxBaseline Analysis Is Important, CPU Performance Analysis In Linux Revisited). I wrote this little Nagios plugin to collect the performance metrics that sar collects.

I use this plugin with Zenoss and I set any performance thresholds there, more important to me was collecting the information for historical graphing. I searched around and didn’t really find any existing solutions thats why anyone wanting to do similar perhaps with cacti is stuck with my craptastic code (or please point me to a better implementation).  Anyway if you want to grab the plugin and check it out its on github.