ps_ - Wildcard plugin to monitor number of processes
This is a wildcard plugin. The wildcard prefix link name should be the process name to monitor.
This plugin uses the following configuration variables:
[ps_*] env.regex - Regular expression used to filter output from pgrep / ps.
Whatever matches this regular expression is included in the count.
The default configuration is to set "env.regex" to the link name prefix.
ln -s /usr/share/munin/node/plugins-auto/ps_ /etc/munin/node.d/ps_exim
...will monitor number of exim-processes.