CPU spiking issue

Posted on 2011-05-10
Last Modified: 2012-05-11
I've got a CPU spiking issue on a server where it just stays at 80-95% CPU and I can't figure out what's causing it.

Nothing shows in Task Manager that points to it, or Resource Monitor, or what I can see through SQL.

Can anyone see anything based off the attached screenshots or advise what else I could check to try and track it down?
Question by:PeterErhard
    LVL 66

    Accepted Solution

    I think Process Explorer will give you a better view, and also a history graph to show what is spiking....

    It will also show you DPC's and Interupts, which you cannot see in the Task Manager...

    Author Comment

    Thanks John.

    See the attached screenshot. Nothing there that points to why the server is running at 85% CPU either. This is really bizzare.
    LVL 66

    Expert Comment

    Any errors in the event log? Ive never seen Process Explorer not be able to account for it all...

    Unless you have a Rootkit perhaps, thats hiding from the system....

    Does the same behaviour occurr in Safe Mode (if you can bring the server down briefly?)
    LVL 9

    Expert Comment

    probably some hidden services. are you running any virtual application?

    Author Comment

    Thanks guys. We're going to reboot the server tonight we've decided. I'll post back if that resolves a problem if it still occurs.

    Author Comment

    Apologies for the delayed response, a reboot cleared the issue.

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