check_procs CPU %?

I'm trying to monitor for runaway processes, but it appears that 
check_procs --metric=CPU gathers its data in such a way that it is 
reporting CPU % since the process started rather than more-or-less 
instantaneous.  I'm watching processes that run for weeks or months, so 
that entire runtime average isn't very useful.  Actually, I can't think 
of any situation where it _would_ be useful.

Is there a way to get check_procs to use an instantaneous value rather 
than a time average?

-- 
Joel Lord
Sr. Systems Analyst
Institute for Traffic Safety Management and Research
518-453-0291 x114