Q: What is the AverageProcessorUsage value in the Hyper-V measurement report?

A: At first you might think the AverageProcessorUsage property that's shown in the Measure-VM output is average CPU utilization percentage.

However, the value might be over a 100, which is impossible. What the value actually shows is the average MHz during the monitoring period.

MHz is used rather than % since different servers have different processors with different capabilities, so using just a % isn't actually a great indication of CPU resource use compared to virtual machines (VMs) running on different servers with different processors.

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