Aroop V Simon wrote:
That’s the problem, HA does not allow me configure the VM with greater RAM. I need 24 GB but HA is allowing me only 16. So I thought a memory reservation should be the workaround.
Depending on your Admission Control Policy, doing reservations will only make things worse. As mentioned before, the largest reservation (which might be this particular VM) impacts the so called "slot size", which HA uses like a template for how large a VM is. The most possible outcome is that you will get less VMs that are allowed to be powered on.