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smalex's avatar
smalex
Icon for Altostratus rankAltostratus
Jan 05, 2020

High CPU 3 Utilization from Standby device

We have a 5250 HA pair provisioned for LTM and ASM. I understand the capability is low for this device and CPU3 is used for ASM. But now I am seeing high CPU utilization of CPU 3 on standby device. Is this expected? I was assuming that only primary device would handle traffic and hence CPU shouldn't be utilized so much.

 

Please help

application delivery
ASM Advanced WAF
LTM
security
  • Samir's avatar
    Samir
    Icon for MVP rankMVP
    Jan 05, 2020

    There are few case, when you will notice high cpu in standby decide.

     

    1. During sync from active to Standby[i.e Incremental Sync, full box sync, etc.]
    2. Check if any tcpdump, backup script, qkview or asmqkview executed during specific time..
    3. run the unix top command in bash mode to check if any process is consuming more memory or cpu.
    4. If above points is good then open support case.

     

    Above points will help you to solve issue.