[Openstack] Openstack+KVM+overcommit, VM priority

Ivan Derbenev ivan.derbenev at tech-corps.com
Wed Jan 11 21:34:32 UTC 2017

Hello, guys!

Imagine we have a compute node with kvm hypervisor installed

It has 64gb RAM and quad core processor

We create 2 machines in nova on this host - both with 64gb and 4 VCPUs

if both vms start using all 64gb memory, both of them start using swap

same for cpu - they use it equally

So, the question is - is it possible to prioritize 1st vm above 2nd? so the second one will fail before the 1st, to leave maximum possible perfomance to the most importan one?

like production and secondary services running on the same node.
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