Posts Tagged ‘sysstat’

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 Necks, CPU Performance Analysis In Linux, Baseline 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.

check_sar_perf

Yesterday I wrote about CPU Performance Analysis in Linux. I explained how to tell if you are experiencing a CPU bottleneck. This is just a quick followup to show the effect of adding more cpu power. (more…)

A while back I wrote a post Analyzing Linux System Performance and Finding Bottlenecks. I did’t really give a good explanation of determining if you are CPU bound or not so I am writing this post to clear that up. (more…)

System performance analytics seems to be a frequent question on forums and mailing lists. Finding out why something is slow is generally nontrivial as there are many factors to consider. I have found the sysstat package to be an invaluable tool when looking at system performance. Specifically the command sar gives a wealth of information. (more…)