Please LGTM if OK... https://github.com/apache/cloudstack/pull/3016
On Fri, 9 Nov 2018 at 14:20, Andrija Panic <andrija.pa...@gmail.com> wrote: > THx Wido, let me add this to agent.properties template on master, since > it's missing, I have no idea where you got it from (perhaps from code that > uses it).... > > thx > > On Fri, 9 Nov 2018 at 13:35, Wido den Hollander <w...@widodh.nl> wrote: > >> >> >> On 11/9/18 1:33 PM, Andrija Panic wrote: >> > Thanks Wido - though I don't seem to be able to find any related setting >> > (there is host.overcommit.mem.mb but that is not it - unless you can >> > define negative value to it ) ? >> > >> https://github.com/apache/cloudstack/blob/master/agent/conf/agent.properties >> > >> >> host.reserved.mem.mb=32768 >> >> That one should be the setting you might want to look at. >> >> In this case 32G is reserved and not available to CS. >> >> Wido >> >> > >> > thx >> > >> > On Fri, 9 Nov 2018 at 13:03, Wido den Hollander <w...@widodh.nl >> > <mailto:w...@widodh.nl>> wrote: >> > >> > >> > >> > On 11/9/18 12:56 PM, Andrija Panic wrote: >> > > 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... >> > > >> > >> > >> > You can do that already, in agent.properties you can set reserved >> > memory. >> > >> > But I doubt indeed that we need such a limit in ACS at all, why do >> we >> > need to limit the amount of Instances on a hypervisor? >> > >> > Or at least set it to a very high number by default. >> > >> > Wido >> > >> > > On Fri, 9 Nov 2018 at 12:03, Rafael Weingärtner >> > <rafaelweingart...@gmail.com <mailto: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 >> > <mailto: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 >> > <mailto: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 >> > <mailto: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 >> > > > -- > > Andrija Panić > -- Andrija Panić
