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High nwk_exempt CPU consumption on A800 driven by heavy Single Volume Workload

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Category:
ontap-9
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perf
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Applies to

  • ONTAP 9
  • Single Volume Workload

Issue

  • cpu_busy abnormally high on a 48-CPU A800(usually > 90%)
  • nwk_exempt CPU domain util abnormally high (usually > 2000%) on a 48-CPU A800

*> node run -node <node_name> -command "priv set diag;sysstat -M 1" 

1414501_1.png

  • Heavy workload from one single volume, usually more than 100k/s IOPS

 

 

 

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