monitor cpu usage...

[Hiren Patel]

Craig A wrote:
>     could you perhaps paste relevant pieces of check_proc using -vvv?
>     just out of interest, how did you install nagios-plugins on this host?
>     package or compiled?
> 
> 
> 
> Hmm, that's interesting - i didn't know about '-vvv' - lots of useful 
> info there.   Nagios-plugins on this host was compiled.   By this time, 
> our offending process (a jvm) is now behaving normally and has stopped 
> consuming 100% constantly.    But when we stress the server manually, if 
> I watch 'top', i can see % CPU for that process go above 60% for several 
> seconds (ie. if i hit 'space bar' for 2-3 seconds, it's pinned at 60% 
> for a few seconds, then it goes back to normal {ie. < 1%}).     But if i 
> constantly run 'check_procs' (as a dummy test, i threw it in a loop and 
> had it run 100 times with no sleep and log the results), it still 
> doesn't view the java process as above 0%...  
> 
> If i try exactly the same thing (running check_procs 100 times) with a 
> non-jvm process (ie. i used '-C top' and then hit space bar to push top 
> above 20% usage), check_procs reports properly.
> 
> Any idea why I'd be getting this descrepancy?

not really. paste what check_procs sees about the java process after 
using -vvv, and any other useful info -vvv gives you.

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