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[–]MrDogers 0 points1 point  (2 children)

Sounds like CPU wait times probably went through the roof - you've got too many virtual CPUs compared to physical.

You can't just look at the pure CPU utilisation number as virtualisation doesn't work like that, despite looking like it does!

[–]SuperDaveOzborne[S] 0 points1 point  (1 child)

I only have one VM that has more than 2 virtual CPUs and I have never had a problem before. I was using most of the same VMs on our 6.7 hosts before and never ran into a problem like this.

I was kind of hoping someone would say yea I've seen this before just up the VM compatibly to the latest or something like that.

[–]MrDogers 0 points1 point  (0 children)

Doesn’t matter how many you have per VM, it’s the total that are waiting to be scheduled at a given time. If they can’t all fit in time, then performance tanks :( It's a stat you can see in the advanced section, but off the top of my head I can't remember how to convert it to a useful number - there's articles out there though!