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From Brian Pane <brian.p...@cnet.com>
Subject Re: 2.0.30-dev load spiking [was: upgrade to FreeBSD 4.5-PRERELEASE]
Date Wed, 02 Jan 2002 21:40:52 GMT
Greg Ames wrote:

>Jeff & I discussed how to troubleshoot this baby.  Some thoughts:
>* compare trusses and look for abnormalities
>* scrutinize the error logs
>* calculate and log how much CPU time each request takes, the thought
>being that some requests are burning a lot more CPU than they used to.  
>
>Any other ideas?  
>

One more thought:  I graphed the CPU utilization from your vmstat
output, and the spike is mostly sys time, not usr.  So truss/strace
data may be helpful--especially if truss on that platform can measure
the time spent in each syscall.

--Brian



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