Memory oversubscription

For memory oversubscription, we recommend that you start with a subscription factor of 1 (100%).

If you want better memory utilization, we have found from limited testing that a subscription factor of 1.2 (120%) works adequately for some workloads. We do not recommend using anything higher than 1.2 without careful testing.

As with CPU oversubscription, we recommend that you test your workload for a minimum of a week, under real-world conditions, to determine the right subscription factor level and whether a subscription factor higher than 1.2 is safe.