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How to tell what's causing CPU spikes?

Since updating to 9.508-10, I get CPU usage spikes at intervals. I'm thinking this may be a bug which is causing a service to restart but I haven't found anything yet.

The image below shows CPU usage before and after the update (around 09:30):

 

I've viewed all of the logs but I haven't been able to identify what's causing the spikes.

Any suggestions?



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  • Probably pattern updates - look in the Up2Date log. the cssd process eats a lot of cycles when Web Filtering patterns are updated.

    Cheers - Bob

  • Thanks, Bob.

    I do see the following Up2Date log entries about 30 seconds prior to the spikes:

    [INFO-306] New Pattern Up2Dates installed

    What's odd to me is the fact that these spikes did not happen until the last update to 9.508-10.

  • How often do you have it set to update?  I have mine at 6hrs.  Maybe set it at 24 hours and see what happens.

  • Jay Jay said:
    How often do you have it set to update?  I have mine at 6hrs.  Maybe set it at 24 hours and see what happens.

    I'll have to check that but I haven't changed any settings. Both are set to the default of 15 minutes.

    Again, what's puzzling me is the fact that I started getting the spikes in CPU usage immediately after updating to 9.508-10. I haven't touched any settings. You can see how flat the CPU usage is in the first third of the graph depicted in the image I added to my original post. The first third shows CPU usage with FW version 9.507-1.

  • My theory is that it's cssd integrating the new patterns into a spread-out database is what causes the spike.  I've thought that it might be interesting to see if they go away after an install from ISO.  Let us know if that solves this for you.

    Cheers - Bob

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  • My theory is that it's cssd integrating the new patterns into a spread-out database is what causes the spike.  I've thought that it might be interesting to see if they go away after an install from ISO.  Let us know if that solves this for you.

    Cheers - Bob

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