Why have my cpu credits suddenly disappeared?

Question

I have several AVD VMs running on Standard B4MS CPUs. Not had any performance problems for months until this week, The VM metrics show that until this week, CPU credits were constantly at 1200. Then, over the course of a day the credits went down to zero. The CPU credit usage graph normally averages less than 1. Where have all my credits gone? Is the system broken?

Answer 1

Hi Albert,

When a VM is Deallocated or Redeployed the credits reset. Since you redeployed the VM as a troubleshooting step this is the likely cause of the drop you are seeing.

B Series CPU Credit Model

https://learn.microsoft.com/en-us/azure/virtual-machines/sizes/b-series-cpu-credit-model

We should continue troubleshooting the cause of slowness over in your other question.

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP