launchpad-reviewers team mailing list archive

[Steve Kowalik <stevenk@xxxxxxxxxx>]

Steve Kowalik has proposed merging lp:~stevenk/launchpad/buildfarmjob-index into lp:launchpad.

Requested reviews:
  Robert Collins (lifeless): db
  Stuart Bishop (stub): db
Related bugs:
  Bug #1001838 in Launchpad itself: "Builder:+history timeouts due to terrible main query"
  https://bugs.launchpad.net/launchpad/+bug/1001838

For more details, see:
https://code.launchpad.net/~stevenk/launchpad/buildfarmjob-index/+merge/123675

As one half of the fix for the linked bug, add an index onto BuildFarmJob. This will be used by <MP to be linked> to speed up the query used by Builder:+history from approximately 9 seconds to 2ms.
-- 
https://code.launchpad.net/~stevenk/launchpad/buildfarmjob-index/+merge/123675
Your team Launchpad code reviewers is subscribed to branch lp:launchpad.

=== added file 'database/schema/patch-2209-27-3.sql'
--- database/schema/patch-2209-27-3.sql	1970-01-01 00:00:00 +0000
+++ database/schema/patch-2209-27-3.sql	2012-09-11 04:34:21 +0000
@@ -0,0 +1,8 @@
+-- Copyright 2012 Canonical Ltd.  This software is licensed under the
+-- GNU Affero General Public License version 3 (see the file LICENSE).
+
+SET client_min_messages=ERROR;
+
+CREATE INDEX buildfarmjob__builder__date_finished__id__idx ON BuildFarmJob(builder, date_finished DESC, id);
+
+INSERT INTO LaunchpadDatabaseRevision VALUES (2209, 27, 3);