We've been having problems after installing August 2020 Patches on our 2019 HyperV hosts. We have multiple hyper-v clusters across Dell VRTX and UCS blades w/ ISCSI backend SANS. Both environments have seen backup times double. Additionally loading a VMs settings in HyperV or Failover cluster manager is taking a very long time. We are not using a 3rd party AV but defender managed by SCCM. Usually when i see issues like this it feels like a storage performance issue but i'm seeing the issue across the board with iscsi as well as direct attached.
Patches applied
KB4566424
KB4565349
KB4569776
our change log indicates no other changes. Our hyperv hosts have no other roles.
I'm going to try roll back the august patching and do a quick A/B test to see if that remediates the issue, but thought i'd post to see if anyone else has seen this issue.
Chris




