[PVE-User] Number of cores per VM best practice

Dietmar Maurer dietmar at proxmox.com
Wed Feb 11 06:07:48 CET 2015

> How much impact will over committing VM cores have?
> e.g, I have a Server with  aIntel E5-2620 (1 Socket, 6 Cores, 12  logical
> Cores).
> If I run 5 VM's with 4 cores each for a total of 20 cores, obviously it
> will effect performance, but will it be a huge drop, or just a percentage
> decrease?

KVM uses the normal linux process scheduler, so the impact should be small.
But honestly, I have never done any benchmarks to measure the impact exactly.

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