On Wed, Sep 17, 2014, at 06:37 PM, Matt Riedemann wrote: > > > On 9/17/2014 7:59 PM, Ian Wienand wrote: > > On 09/18/2014 09:49 AM, Clark Boylan wrote: > >> Recent sampling of test run times shows that our tempest jobs run > >> against clouds using PostgreSQL are significantly slower than jobs run > >> against clouds using MySQL. > > > > FYI There is a possibly relevant review out for max_connections limits > > , although it seems to have some issues with shmem usage > > > > -i > > > >  https://review.openstack.org/#/c/121952/ > > > > _______________________________________________ > > OpenStack-dev mailing list > > OpenStackfirstname.lastname@example.org > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > > That's a backport of a fix from master where we were hitting fatal > errors due to too many DB connections which was brought on by the > changes to cinder and glance to run as many workers as there were CPUs > available. So I don't think it probably plays here... > > The errors pointed out in another part of the thread have been around > for awhile, I think they are due to negative tests where we're hitting > unique constraints because of the negative tests, so they are expected. > > We should also note that the postgresql jobs run with the nova metadata > API service, I'm not sure how much of a factor that would have here. > > Is there anything else unique about those jobs from the MySQL ones? > Good question. There are apparently other differences. The postgres job runs Keystone under eventlet instead of via apache mod_wsgi. It also sets FORCE_CONFIGDRIVE=False instead of always. And the final difference I can find is the one you point out, nova api metadata service is run as an independent thing.
Could these things be related? It would be relatively simple to push a change or two to devstack-gate to test this but there are enough options here that I probably won't do that until we think at least one of these options is at fault. > > -- > > Thanks, > > Matt Riedemann > > > _______________________________________________ > OpenStack-dev mailing list > OpenStackemail@example.com > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev _______________________________________________ OpenStack-dev mailing list OpenStackfirstname.lastname@example.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev