The way I look at it, you can never have too many tools for monitoring the prefomance of your servers!
And it’s best to look round before you actually need them too. Run them on your system when things are ‘normal’ – that will make tracking down problems a lot easier when things start to go wrong.
A handy little tools that combines the functionality of vmstat, iostat, netstat, nfsstat is called dstat.
If you’re using CentOS this can be install via rpmforge (click here for details on adding the rpmforge repo) by doing a
then you can just run dstat (or ‘man dstat’ for some options)
Here’s an example of the output you can expect to see –