-----Original Message----- From: Dean Troyer <[email protected]> Reply: OpenStack Development Mailing List (not for usage questions) <[email protected]>> Date: September 17, 2014 at 21:21:47 To: OpenStack Development Mailing List (not for usage questions) <[email protected]>> Subject: Re: [openstack-dev] PostgreSQL jobs slow in the gate
> > > > Clark Boylan Wrotr : > > > >> It appears that keystone eventlet is the source of the slowness in this > >> job. With keystone eventlet all of the devstack jobs are slower and with > >> keystone wsgi all of the jobs are quicker. Probably need to collect a > >> bit more data but this doesn't look good for keystone eventlet. > >> > > > On Wed, Sep 17, 2014 at 11:02 PM, Morgan Fainberg < > [email protected]> wrote: > > > I've kicked off a test[1] as well to check into some tunable options > > (eventlet workers) for improving keystone eventlet performance. I'll circle > > back with the infra team once we have a little more data on both fronts. > > The Keystone team will use this data to figure out the best way to approach > > this issue. > > > > Brant submitted https://review.openstack.org/#/c/121384/ to up the Keystone > workers when API_WORKERS is set. > > I submitted https://review.openstack.org/#/c/122013/ to set a scaling > default for API_WORKERS based on the available CPUs ((nproc+1)/2). There > is a summary in that commit message of the current reviews addressing the > workers in various projects. > > I think it has become clear that DevStack needs to set a default for most > services that are currently either too big (nproc) or too small (Keystone > at 1). Of course, moving things to mod_wsgi moots all of that, but it'll > be a while before everything moves. > > dt > > -- > > Dean Troyer > [email protected] Dean, We should probably look at increasing the default number of workers as well in the Keystone configuration (rather than just devstack). It looks like, with limited datasets, we are seeing a real improvement with Keystone and 4 workers (from my previously mentioned quick test). Thanks for the extra data points. This helps to confirm the issue is Keystone under eventlet. Cheers, Morgan _______________________________________________ OpenStack-dev mailing list [email protected] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
