Help CPU pegged at 96% but cannot find culprit

[JB]

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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