On 21/04/15 14:39 +0000, Nikhil Komawar wrote:
This is a good idea. We recently removed a unique constraint that may result into some queries being very slow especially those that involve "name" property. I would recommend sketching out a spec that identifies potential full table scans especially for queries that join over image_properties table.We should discuss there what other use cases look like rather than smaller feedback on the ML.
More thatn a spec, I'd be interested in seeing the patch with the change up and the results reported in Rally. I guess we'll need a spec anyway, although I'd probably be ok with a good bug report here. /me *shrugs* Flavio
Thanks, -Nikhil ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ From: Mike Bayer <mba...@redhat.com> Sent: Tuesday, April 21, 2015 9:45 AM To: openstack-dev@lists.openstack.org Subject: Re: [openstack-dev] [glance] Why no DB index on sort parameters On 4/21/15 2:47 AM, Ajaya Agrawal wrote: Hi All, I see that glance supports arbitrary sort parameters and the default is "created_at" while listing images. Is there any reason why we don't have index over these fields? If we have an index over these fields then we would avoid a full table scan to do sorting. IMO at least the created_at field should have an index on it. just keep in mind that more indexes will place a performance penalty on INSERT statements, particularly at larger volumes. I have no idea if that is important here but something to keep in mind. Cheers, Ajaya__________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
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-- @flaper87 Flavio Percoco
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