From 027668f0dbf37ad07b9e28152fbfac092d4540d0 Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Tue, 11 Feb 2020 12:52:28 -0500
Subject: [PATCH] hydra.sql: add an index for slow queries in production

These queries used to use (jobset, project) based indexes,
and the addition of jobset_id makes most of those indexes
unusable now.
---
 src/sql/hydra.sql      | 1 +
 src/sql/upgrade-65.sql | 2 ++
 2 files changed, 3 insertions(+)
 create mode 100644 src/sql/upgrade-65.sql

diff --git a/src/sql/hydra.sql b/src/sql/hydra.sql
index 1f4288f7..8144dd30 100644
--- a/src/sql/hydra.sql
+++ b/src/sql/hydra.sql
@@ -682,6 +682,7 @@ create index IndexBuildsOnProject on Builds(project);
 create index IndexBuildsOnTimestamp on Builds(timestamp);
 create index IndexBuildsOnFinishedStopTime on Builds(finished, stoptime DESC);
 create index IndexBuildsOnJobFinishedId on builds(project, jobset, job, system, finished, id DESC);
+create index IndexBuildsOnJobsetIdFinishedId on Builds(id DESC, finished, job, jobset_id);
 create index IndexFinishedSuccessfulBuilds on Builds(id DESC, buildstatus, finished, job, jobset_id) where buildstatus = 0 and finished = 1;
 create index IndexBuildsOnDrvPath on Builds(drvPath);
 create index IndexCachedHgInputsOnHash on CachedHgInputs(uri, branch, sha256hash);
diff --git a/src/sql/upgrade-65.sql b/src/sql/upgrade-65.sql
new file mode 100644
index 00000000..11d143e5
--- /dev/null
+++ b/src/sql/upgrade-65.sql
@@ -0,0 +1,2 @@
+-- Add an index like IndexBuildsOnJobFinishedId using jobset_id
+create index IndexBuildsOnJobsetIdFinishedId on Builds(id DESC, finished, job, jobset_id);