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Why does AWS show 100 percent cpu utilization on the Cloud Volumes ONTAP instance?

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cloud-volumes-ontap-cvo
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cloud
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Applies to

  • Cloud Volumes ONTAP
  • Amazon Web Services (AWS)

Answer

The 100% CPU utilization as viewed from AWS is expected. In virtual environments, ONTAP keeps the vCPUs in an always ready state to improve performance of the system. ONTAP does not perform the halt CPU instruction when idle and this makes the idle thread appear to be hot on a vCPU.
 
From the AWS perspective, this will be viewed as 100% CPU utilization.
 
In comparison, you can see the actual CPU utilization from the ONTAP perspective via the sysstat (or statistics show) command from the ONTAP CLI.

Additional Information