NonstandardProcesses

Idleserver looks at all of the processes on the system, filters out any "standard" processes that you have configured it to ignore by user name or a regex against the command and arguments, and then uses any remaining processes to calculate an idleness score.

The idleserver client comes with an example idleserver.conf that has a fairly complete list of standard processes on a Red Hat/CentOS system. Of course the list will probably require some tuning for your environment. The server has a "Process Report" view that makes it easy to see which processes are being reported as non-standard so that you can identify additional ones that should be added to the filter.