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solaikumar_1217's avatar
solaikumar_1217
Icon for Nimbostratus rankNimbostratus
Feb 29, 2016

High CPU in F5 LTM

Dear All,

 

We have one SSL offloading VS which enables an access to one of the core application in customer environment, during the load test we found CPU utilization of F5 has gone to 100% , without any error logs in /var/log/ltm .At the same time the server team have not reported any abnormalities from their end. Any suggestions would be appreciated ?

 

We were also noticed that , during high CPU all the connections went into hung mode.

 

application delivery
LTM

5 Replies

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  • samstep's avatar
    samstep
    Icon for Cirrocumulus rankCirrocumulus
    Mar 01, 2016

    What is the hardware model and the BIG-IP version that you are using? Is this a Virtual F5?

     

    In any case you should raise a support case by emailing support@f5.com

     

    • solaikumar_1217's avatar
      solaikumar_1217
      Icon for Nimbostratus rankNimbostratus
      Mar 03, 2016
      Hi Amanpreet, I am not sure about the tools they are using to test. anyways it seems to be stable now post upgrade.
  • Vijith_182946's avatar
    Vijith_182946
    Icon for Cirrostratus rankCirrostratus
    Mar 03, 2016

    Hi Solai, Couple of things required to answer your query, as like any hardware what version, hotfix, module, process is taking high CPU utilization etc. I would switch into bash mode and fire 'top' command (and ps) acnd check the the process which is using high CPU..once you identified the process then hit that process and investigate further..

     

    cheers