Check manual page of statgrab_load
CPU load (by statgrab)
This check measures and checks the averaged CPU load during the last check
cycle by using the statgrab tool of the operating system. The values
for 1, 5 and 15 minute average are sent, although the PNP template
shipped with check_mk only displays the 1 and 15 min average load.
Make sure you have the statgrab binary available on the monitored
machine. Under HP-UX you also need to activate the hpux_statgrab agent plugin.
Note: The CPU load is the average number of processes that are
currently in the state "running". Do not mix this up with the
CPU "utiliziation" (which measures the current usage of the CPU
One check per host is created if the agent contains a statgrab_load