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VASA Provider: Large number of bindVirtualVolume and unbindVirtualVolume API calls lead to high CPU utilization

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Applies to

  • ONTAP Tools for VMware vSphere (OTV) 9.11 and earlier
  • VASA Provider

Issue

When a large number of virtual machines are powered on or powered off this triggers two types of API calls to VASA Provider (VP):

  • unbindVirtualVolume 
  • bindVirtualVolume 

With VASA Provider 9.11 and earlier, a large number of these bind / unbind API threads may accumulate and drive up CPU utilization on the OTV appliance.

When monitoring the VASA Provider "Right Now" page (https://<OTV>:9083/rightnow), you see 100s of inflight bind / unbind calls:

clipboard_e31d209902ba71f915af9300d76ce4c20.png

From the OTV systemshell, running top shows vpserver (the VASA Provider service) is what is driving the high CPU utilization:

clipboard_ed83ea820e935db8845cb45a455825b7b.png

 

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