We recently had, after we migrated from vSphere 4 to vSphere 5, a memory limit in size of the configured memory on each and every VM. Since memory limits on VM level pretty much destroy performance, I went ahead an wrote this simple script to remove all memory limits on all VMs that don’t have “Unlimited” configured:
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; html-script: false ]param( [string] $vCenter ) # Add the VI-Snapin if it isn't loaded already if ( (Get-PSSnapin -Name "VMware.VimAutomation.Core" -ErrorAction SilentlyContinue) -eq $null ) { Add-PSSnapin -Name "VMware.VimAutomation.Core" } If ( !($vCenter) ) { Write-Host Write-Host "cluster-remove-mem-limits: <vcenter-server>" Write-Host Write-Host " <vcenter-server> - DNS name of your vCenter server." Write-Host exit 1 } Connect-VIServer -Server $vCenter Get-VM | Get-VMResourceConfiguration | Where-Object { $_.memlimitmb -ne '-1' } |` Set-VMResourceConfiguration -memlimitmb $null Disconnect-VIServer -server $vCenter -Confirm:$false |
This script is basically what the guy over at get-admin.com did, just only for memory limits.