This new KB article describes the four approaches for the cluster overcommit algorithm in Microsoft System Center 2012 R2 Virtual Machine Manager (VMM 2012 R2).
The goal of the VMM cluster overcommit check is to determine whether there is any possibility that virtual machines will not be restarted if there is a concurrent failure of cluster reserve (
) nodes. The cluster is assumed to be overcommitted until proven otherwise. Four approaches are tried, and if any approach can show that the cluster is
overcommitted then the cluster state is set to "OK", otherwise the cluster state is set to "Overcommitted."
For details on each of the four calculations please see the following: