afaik not - but I did run once or twice intom perhaps looselym connected issue - ACS reports 100% of host RAM (makes sense) asavailable for VM deployment to ACS - so in 1-2 cases I did run into out of memory killer, crashing my VMs.
It would be great to have some amount of "reserve RAM" for host OS - or simply have PER HOST RAM disableTreshold setting, similar to cluster level "cluster.memory.allocated.capacity.disablethreshold", just on host level... On Fri, 9 Nov 2018 at 12:03, Rafael Weingärtner <rafaelweingart...@gmail.com> wrote: > Do we need these logical constraints in ACS at all? > > On Fri, Nov 9, 2018 at 6:57 AM Wido den Hollander <w...@widodh.nl> wrote: > > > > > > > On 11/8/18 11:20 PM, Simon Weller wrote: > > > I think these is legacy and a guess back in the day. It was 50 at one > > point and it was lifted higher a few releases. ago. > > > > > > > I see. I'm about to do a test with a bunch of 128GB hypervisors and > > spawning a lot of 128M VMs. Trying to see where the limit might be and > > also stress the VR a bit by loading a lot of DHCP entries. > > > > Wido > > > > > > > > > > > > > > ________________________________ > > > From: Ivan Kudryavtsev <kudryavtsev...@bw-sw.com> > > > Sent: Thursday, November 8, 2018 3:58 PM > > > To: dev > > > Subject: Re: KVM Max Guests Limit > > > > > > Hi all, +1 for higher numbers. > > > > > > чт, 8 нояб. 2018 г. в 16:32, Wido den Hollander <w...@widodh.nl>: > > > > > >> Hi, > > >> > > >> I see that for KVM we set the limit to 144 guests by default, can > > >> anybody tell me why we have this limit set to 144? > > >> > > >> Searching a bit I found this: > > >> https://access.redhat.com/articles/rhel-kvm-limits > > >> > > >> "This guest limit does not apply to Red Hat Enterprise Linux with > > >> Unlimited Guests. There is no guest limit for Red Hat Enterprise > > >> Virtualization" > > >> > > >> There is always a limit somewhere, but why do we set it to 144? > > >> > > >> I would personally vote for increasing this to 500 or something so > that > > >> users don't run into it that easily. > > >> > > >> Also, the log line is printed in DEBUG mode only when a host reaches > > >> this limit, so I created a PR to set this to INFO: > > >> https://github.com/apache/cloudstack/pull/3013 > > >> > > >> Any input? > > >> > > >> Wido > > >> > > > > > > > > > -- > > > With best regards, Ivan Kudryavtsev > > > Bitworks LLC > > > Cell RU: +7-923-414-1515 > > > Cell USA: +1-201-257-1512 > > > WWW: http://bitworks.software/ <http://bw-sw.com/> > > > > > > > > -- > Rafael Weingärtner > -- Andrija Panić
