On Wed, 2010-06-16 at 10:36 +0530, Tapas Mishra wrote: > I am having a front end server as Apache for hosting many websites. > Today morning any of my domains were not accessible until I did an SSH > to Apache server and saw > 100% CPU utilization by Apache > http://farm5.static.flickr.com/4018/4704885995_cfdb374ca8_b.jpg > I am using Ubuntu 10.04 what can be reason for this behaviour of > Apache and what should I check. > > High CPU usage is generally caused by things like PHP which Apache has no control over. strace -p <pid> If you run this against the PID stuck at 100%, it should give you some insight into what apache is doing. If you are lucky, you can match the PID with a client IP (netstat -p) which will allow you to look in your logs to see what that client is doing. -- Mark Watts BSc RHCE MBCS Senior Systems Engineer, Managed Services Manpower www.QinetiQ.com QinetiQ - Delivering customer-focused solutions GPG Key: http://www.linux-corner.info/mwatts.gpg
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