Differences in total capacity (MHz) reported by vCenter

I'm still looking through the documentation, but I hope that someone can provide a bit of insight.  When I am connected to our vCenter server and looking at the performance of the host tab, I have the ability to view the total CPU capacity for this host in MHz.

Each host has two processors 6 cores/CPU.  Up to 12 physical cores at 2 GHz each.  In theory, the total CPU capacity for each host is therefore right to approximately 24,000 MHz.  When I retrieve this metric to each host using a PowerShell script, it returns the expected number (approximately 23 988 MHz for each host.  However, when I look at the paintings of performance in vCenter for each host, it says that each host has a total capacity of 21 520 MHz CPU each.

Anyone have any ideas why these numbers are different?  Is it a kind of overload vCenter is subtracting these numbers when you view performance dashboards?

Thank you!

Welcome to the community - vCenter reports what is available for virtualization - the divergence between abd 21.52 24 is that the ESXi host has its own need for CPU and that is subtracted.

Tags: VMware

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