Hi, On Thu, Sep 22, 2016 at 1:48 PM, James Slagle <james.sla...@gmail.com> wrote:
> On Thu, Sep 22, 2016 at 10:36 AM, Gabriele Cerami <gcer...@redhat.com> > wrote: > > Hi, > > > > As reported on this bug > > > > https://bugs.launchpad.net/tripleo/+bug/1626483 > > > > HA gate and periodic jobs for master and sometimes newton started to > > fail for errors related to memory shortage. Memory on undercloud > > instance was increased to 8G less than a month ago, so the problem > > needs a different approach to be solved. > > > > We have some solutions in store. However, with the release date so > > close, I don't think it's time for this kind of changes. So I thought > > it could be a good compromise to temporarily increase the undercloud > > instance memory to 12G, just for this week, unless there's a rapid way > > to reduce memory footprint for heat-engine (usually the biggest memory > > consumer on the undercloud instance) > > > > Any other ideas ? > > The OOM error in the bug is from overcloud-controller-0, not the > undercloud. The overcloud nodes in OVB are still at 6GB. I think it > would be reasonable to increase those to 8GB as well. > > I also noticed that there are 4 neutron-server processes despite > having NeutronWorkers: 1 in > https://github.com/openstack-infra/tripleo-ci/blob/master/ > test-environments/worker-config.yaml. > If we can get that down to 1, looks like that might save around 270MB. > > It also looks like there are 2 nova-api workers despite having > NovaWorkers: 1. Is that normal? Getting rid of one of them would save > around another 140MB. > > -- > -- James Slagle > -- In the case of neutron and some of the other worker settings, we can try using 0 instead of 1. This should prevent the spawning of a separate worker processes for anything that is going on. IIRC, neutron server itself spawns separate API and RPC workers. FWIW, I don't think '0' works for nova though. I think if you do that it leaves it unset and it will use the service default. Cheers, Brent
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