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cathy_123's avatar
cathy_123
Icon for Cirrostratus rankCirrostratus
Jun 06, 2019

High CPU Utilization CPU1

Hello F5! Would like to ask for possible cause and fix. We have high CPU utlization on CPU1 . It seems it is the systems causing our CPU1 high utilization. Our F5 is in Virtual and in version 12.1...
Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Jun 06, 2019

96% utilisation for init isn't normal.

 

It's a centos (i.e. RedHat) base. (Not sure which one for 12.1.2 - But my v24 uses Centos 6.8).

 

However it shouldn't normally use a lot of CPU. Anything logged? (/var/adm/messages) or in the 'dmesg' output?

 

Have you edited inittab at all? Normally there's just a single entry in there, but some people (Myself also) like to put important daemons in there with restart enabled. Breaking those can cause init to spin.

 

I take it from the discrepenecy between your tmmsh cpu output and top that it's bursty?

 

 

H

 

  • cathy_123's avatar
    cathy_123
    Icon for Cirrostratus rankCirrostratus
    Jun 06, 2019

    Hi Hamish,

     

    I surely didnt change it.. I am seeing messages on dmesg but I am not really sure about it.

     

    • Hamish's avatar
      Hamish
      Icon for Cirrocumulus rankCirrocumulus
      Jun 06, 2019

      So what are the messages you're seeing? Nobody can help much without the info...