Hi, I have provided the answer to that on https://ask.openstack.org/en/question/101374 where you asked this question as well. That elaborates slightly on 'There are facilities to allow one VM or another to have CPU priority’ which James mentioned below. For RAM such things as Memory Tuning https://libvirt.org/formatdomain.html#elementsMemoryTuning is not supported as well as memory ballooning (which might be part of answer I think) are not supported in Nova. And well, ‘don’t overcommit RAM’ is often a good principle to stick to.
BR, Konstantin > On Jan 12, 2017, at 1:33 PM, Ivan Derbenev <ivan.derbe...@tech-corps.com> > wrote: > > What are the facilities for cpu? That's the initial question - how can I do > it if this is possible > > > Best Regards > Tech-corps IT Engineer > Ivan Derbenev > Phone: +79633431774 > > -----Original Message----- > From: James Downs [mailto:e...@egon.cc] > Sent: Thursday, January 12, 2017 12:56 AM > To: Ivan Derbenev <ivan.derbe...@tech-corps.com> > Cc: openstack@lists.openstack.org > Subject: Re: [Openstack] Openstack+KVM+overcommit, VM priority > > On Wed, Jan 11, 2017 at 09:34:32PM +0000, Ivan Derbenev wrote: > >> if both vms start using all 64gb memory, both of them start using swap > > Don't overcommit RAM. > >> 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? > > Do you mean CPU prioritization? There are facilities to allow one VM or > another to have CPU priority, but what, if a high priority VM wants RAM, you > want to OOM the other? That doesn't exist, AFAIK. > > Cheers, > -j > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
