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Prince_165600's avatar
Prince_165600
Icon for Nimbostratus rankNimbostratus
Mar 29, 2017

Intermittent CPU Spikes on F5

Hi All,

 

I am using below BIGIP Platform: BIG-IP 2000 (C112) Version - Edition11.6.1 - Hotfix HF2

 

Almost every hour observing the cpu spike to be happening on even cores.

 

Collecting the top output, i observe intermittently high utilization is because of this :

 

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

 

18740 root 1 -19 5569m 115m 94m S 88.0 1.4 9931:16 tmm.0 -T 2 --tmid 0 --npus 2 --platform C112 --split-planes -m -s 5418

 

Any idea why is this happening ?

 

 

application delivery
BIG-IP
high cpu
  • DRJ's avatar
    DRJ
    Icon for Altocumulus rankAltocumulus
    Apr 06, 2017

    I've seen similar on a 11.6.1 HF1 box, in my case it's attributed to the ephemeral key generation (hourly). See K14818

     

  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Mar 29, 2017

    I don't think this directly addresses your question, from 11.5, even cores are used for TMM (data plane) and odd cores are used for management plane. K15468