Help CPU pegged at 96% but cannot find culprit

[Romeo Theriault]

Got the problem fixed with the pegged cpu. I came to figure it was  
probably coldfusion because I saw there was some pretty major patches  
for it. But when I stopped coldfusion the cpu stayed pegged. Then I  
stopped apache and the cpu stayed pegged. Then I stopped networking  
and the cpu went down. I turned networking back on and it stayed low  
and has stayed low since. Not sure what that was all about but now  
it's working well.

Thanks for your suggestions.

Romeo

On Jan 11, 2006, at 11:34 AM, JB wrote:

> How many apache processes do u have?
> I had the same issue and the culprit was kernel ES  
> (2.6.9-22.ELsmp). I am
> using an old kernel 2.6.9-11.E on all my RH servers. Based on my  
> cacti it
> looks like the new kernel has a different and bad way of using swap.
> Top indicated 400 Apache processes with little each ;) Now I have  
> the same #
> of processes but that amount is slightly different.
> I tried with a newer kernel and was the same thing. It happen as  
> well on a
> system without HT.
>
> JB
>
> -----Original Message-----
> From: redhat-sysadmin-list-bounces at redhat.com
> [mailto:redhat-sysadmin-list-bounces at redhat.com] On Behalf Of Romeo
> Theriault
> Sent: Wednesday, January 11, 2006 3:27 PM
> To: redhat-sysadmin-list at redhat.com
> Subject: Help CPU pegged at 96% but cannot find culprit
>
> Fresh install of red hat enterprise AS 4 update 2 with all the
> patches, running as a web server(apache) with coldfusion. The cpu is
> pegged at around 96% with 65 or so under user and 30 or so for the
> system. I've done a top and nothing is showing as using this much
> cpu. I downloaded ibm's performance tool nmon and tried it and it's
> showing the same stats. How can I find the process which is taking up
> so much cpu. Thank you very much.
>
> Romeo Theriault
>
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