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answ161's avatar
answ161
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Aug 23, 2023

Higher Monitor CPU Usage in v16

Hi All, After an attempted upgrade of our production BIG-IPs (i4600 HA pair) from v14 to v16 earlier this year that required a rollback due to high CPU utilization, I have been doing testing on some...
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answ161's avatar
answ161
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Aug 30, 2023

Hi holge, no updates yet.  I'm going to be opening a case on this with F5 support today.  I'll keep updates posted in here as I learn more.  During testing of a few different versions, I also see the same behavior in 16.1.4.  Given some time to sit over the past week, average CPU is 18% higher compared to an identical VE running 14.1.4.6.

  • AndreiHurmuz's avatar
    AndreiHurmuz
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    Nov 21, 2023

    Hi answ161 

    did you get any resolution on that issue? We are experimenting the same problem with v16, as of now 4 systems have increased CPU usage since the update, VE and HW Big-Ip. 

    Many thanks in advance!

     

    • answ161's avatar
      answ161
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      Nov 21, 2023

      Hi AndreiHurmuz,

      In my configuration, F5 support helped to determined that LDAP monitors in v16 are the cause of higher CPU utilization.  Removing LDAP monitors caused CPU to drop by about 15%.  However, the reason why LDAP monitors use more CPU in v16 is not known.  

      This may not be the cause in your case, but top output should confirm this. 

      • AndreiHurmuz's avatar
        AndreiHurmuz
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        Nov 21, 2023

        Thank you for the quick reply, i do not think this is my issue, as far as i have gathered i think for our case Java could be the issue. I will open a case and see where that goes. Thanks again for the update!