Vsphere Support for Memory Hot Add and CPU Hot Plug

You can determine whether a guest OS supports CPU Hot Plug by changing the VM’s settings to whatever guest OS you want to check, and then saving the VM’s settings and editing the settings again to see if the option appears.some popular operating systems and their support for Memory Hot Add and CPU Hot Plug.

To enable these features the VM must be powered off, so it’s best to enable them when you create a VM. Once you have enabled the features, you can edit the VM’s settings while it is powered on and add more memory or more CPUs to it. In some cases, depending on the operating system, your VM may see the additional memory/CPU after you add it but will not be able to use it until it has been restarted. Consult your guest operating system documentation to find out if this is the case in your situation. Memory Hot Add and CPU Hot Plug are great features that can help to ensure that your VMs are highly available while being expandable when needed and without interruption.