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insert12_38638's avatar
insert12_38638
Icon for Nimbostratus rankNimbostratus
Apr 11, 2011

CPU utilization 90%

Hello guys , just a quick note , i m suffering 90% high CPU utilization on our 8900 GTM which is quite alarming sign for our network , Interesting to figure out how we can control F5 CPU utilization , troublshooting steps , or suggestion to move on high series , As we are using several irules/scripts to control the flow of traffic. no additional software adds on rather than only general loadbalancing.

 

 

Any source material recomendation ?

 

 

case examples ??

 

 

/ insert

 

config
design
  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Apr 11, 2011
    First question is what's using all that CPU? top will show you.

     

     

    GTM only? Or GTM & LTM?

     

     

    On your iRules, do you have timing enabled?

     

     

    What volume of traffic is hitting your 8900? bps and connections/sec.

     

     

    H
  • insert12_38638's avatar
    insert12_38638
    Icon for Nimbostratus rankNimbostratus
    Apr 11, 2011
    GTM with LTM features also

     

    Irules are enabled with timing

     

    830 TPS were there at that while Spikes 90%

     

     

    Top output will let u know soon .

     

    It is not constant utlization on 90% , spikes come while on busy timing on our server. now after that settle down to normal 40%

     

    any suggestion ?
  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Apr 11, 2011
    To eliminate the iRules, What do the timings say on them? (You can grab the timings from the iRule Editor, or from bigpipe).

     

     

    H