vCPU:pCPU ratio

From official doc VMware:

      the following vCPU:pCPU ratios can be considered a good starting point for a design:

o1:1 to 3:1 is not typically an issue

oWith 3:1 to 5:1, you might begin to see performance degradation

o6:1 or greater is often going to cause a significant problem for VM performance

I have found this script in VMware Community Site:

Foreach($esx in Get-VMHost){

    $vCPU = Get-VM -Location $esx | Measure-Object -Property NumCpu -Sum | select -ExpandProperty Sum

    $esx | Select Name,@{N='pCPU';E={$_.NumCpu}},

        @{N='vCPU';E={$vCPU}},

        @{N='Ratio';E={[math]::Round($vCPU/$_.NumCpu,1)}}

}

Output is:

Name            pCPU vCPU Ratio

----            ---- ---- -----

phesx01.pre.lab   16   26   1.6