[CentOS] Big load

Johnny Hughes mailing-lists at hughesjr.com
Thu Aug 17 19:23:38 UTC 2006


On Thu, 2006-08-17 at 18:00 +0200, Peter Kjellström wrote:
> On Thursday 17 August 2006 17:35, Marek Dabrowski wrote:
> > I found probabyl reason of my problems... Two minutes ago I rebooted
> > second node. Load on first node decresed from 10 to 2.01. Rebooted node
> > have load 0.29 now. But question "why" that is happening is still open.
> 
> I say it's time to bring out the big hammer.. oprofile.
> 
> rough guide:
> * install the following rpms: oprofile kernel-smp-devel kernel-debuginfo
> * opcontrol --setup --vmlinux=/path/to/vmlinux/from/debuginfo-rpm
> when in abnormal state:
> opcontrol --start ; sleep a bit ; opcontrol --shutdown
> opreport -l -p /lib/modules/$(uname -r)/kernel | head -n 15
> 
> That should give you the top most consumers of processor time and hopefully 
> some clues :-)
> 
> While you're at it, run vmstat for a few seconds and study the first two 
> columns.
> 
> /Peter (who likes big hammers, everything's a nail!!)
> 

hmmmm ... the title of this message does not look good :) ... I though
for sure this was some serious SPAM :)
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