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From: Ian Jackson <ian.jackson@eu.citrix.com>
To: xen-devel@lists.xenproject.org
Cc: Ian Jackson <ian.jackson@eu.citrix.com>,
	George Dunlap <George.Dunlap@citrix.com>
Subject: [OSSTEST PATCH v2 07/41] schema: Provide indices for sg-report-flight
Date: Fri, 31 Jul 2020 12:37:46 +0100
Message-ID: <20200731113820.5765-8-ian.jackson@eu.citrix.com> (raw)
In-Reply-To: <20200731113820.5765-1-ian.jackson@eu.citrix.com>

These indexes allow very fast lookup of "relevant" flights eg when
trying to justify failures.

In my ad-hoc test case, these indices (along with the subsequent
changes to sg-report-flight and Executive.pm, reduce the runtime of
sg-report-flight from 2-3ks (unacceptably long!) to as little as
5-7s seconds - a speedup of about 500x.

(Getting the database snapshot may take a while first, but deploying
this code should help with that too by reducing long-running
transactions.  Quoted perf timings are from snapshot acquisition.)

Without these new indexes there may be a performance change from the
query changes.  I haven't benchmarked this so I am setting the schema
updates to be Preparatory/Needed (ie, "Schema first" as
schema/README.updates has it), to say that the index should be created
before the new code is deployed.

Testing: I have tested this series by creating experimental indices
"trial_..." in the actual production instance.  (Transactional DDL was
very helpful with this.)  I have verified with \d that schema update
instructions in this commit generate indexes which are equivalent to
the trial indices.

Deployment: AFter these schema updates are applied, the trial indices
are redundant duplicates and should be deleted.

CC: George Dunlap <George.Dunlap@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
v2: Use proper \ escaping for underscores in LIKE
---
 schema/runvars-built-index.sql    | 7 +++++++
 schema/runvars-revision-index.sql | 7 +++++++
 schema/steps-job-index.sql        | 7 +++++++
 3 files changed, 21 insertions(+)
 create mode 100644 schema/runvars-built-index.sql
 create mode 100644 schema/runvars-revision-index.sql
 create mode 100644 schema/steps-job-index.sql

diff --git a/schema/runvars-built-index.sql b/schema/runvars-built-index.sql
new file mode 100644
index 00000000..7108e0af
--- /dev/null
+++ b/schema/runvars-built-index.sql
@@ -0,0 +1,7 @@
+-- ##OSSTEST## 007 Preparatory
+--
+-- This index helps sg-report-flight find relevant flights.
+
+CREATE INDEX runvars_built_revision_idx
+    ON runvars (val)
+ WHERE name LIKE 'built\_revision\_%';
diff --git a/schema/runvars-revision-index.sql b/schema/runvars-revision-index.sql
new file mode 100644
index 00000000..8871b528
--- /dev/null
+++ b/schema/runvars-revision-index.sql
@@ -0,0 +1,7 @@
+-- ##OSSTEST## 008 Preparatory
+--
+-- This index helps Executive::report__find_test find relevant flights.
+
+CREATE INDEX runvars_revision_idx
+    ON runvars (val)
+ WHERE name LIKE 'revision\_%';
diff --git a/schema/steps-job-index.sql b/schema/steps-job-index.sql
new file mode 100644
index 00000000..07dc5a30
--- /dev/null
+++ b/schema/steps-job-index.sql
@@ -0,0 +1,7 @@
+-- ##OSSTEST## 006 Preparatory
+--
+-- This index helps sg-report-flight find if a test ever passed.
+
+CREATE INDEX steps_job_testid_status_idx
+    ON steps (job, testid, status);
+
-- 
2.20.1



  parent reply index

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31 11:37 [OSSTEST PATCH v2 00/41] Performance work Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 01/41] Add cperl-indent-level to .dir-locals.el Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 02/41] SQL: Use "LIKE" rather than "like", etc Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 03/41] SQL: Fix incorrect LIKE pattern syntax (literals) Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 04/41] SQL: Fix incorrect LIKE pattern syntax (program variables) Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 05/41] sg-report-flight: Add a comment re same-flight search narrowing Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 06/41] sg-report-flight: Sort failures by job name as last resort Ian Jackson
2020-07-31 11:37 ` Ian Jackson [this message]
2020-07-31 14:21   ` [OSSTEST PATCH v2 07/41] schema: Provide indices for sg-report-flight George Dunlap
2020-07-31 14:55     ` Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 08/41] sg-report-flight: Ask the db for flights of interest Ian Jackson
2020-07-31 14:17   ` George Dunlap
2020-07-31 15:43     ` Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 09/41] sg-report-flight: Use WITH to use best index use for $flightsq Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 10/41] sg-report-flight: Use WITH clause to use index for $anypassq Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 11/41] sg-report-flight: Use the job row from the intitial query Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 12/41] Executive: Use index for report__find_test Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 13/41] duration_estimator: Ignore truncated jobs unless we know the step Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 14/41] duration_estimator: Introduce some _qtxt variables Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 15/41] duration_estimator: Explicitly provide null in general host q Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 16/41] duration_estimator: Return job column in first query Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 17/41] duration_estimator: Move $uptincl_testid to separate @x_params Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 18/41] duration_estimator: Move duration query loop into database Ian Jackson
2020-07-31 11:37 ` [OSSTEST PATCH v2 19/41] Executive: Drop redundant AND clause Ian Jackson
2020-07-31 14:17   ` George Dunlap
2020-07-31 11:37 ` [OSSTEST PATCH v2 20/41] schema: Add index for quick lookup by host Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 21/41] sg-report-host-history: Find flight limit by flight start date Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 22/41] sg-report-host-history: Drop per-job debug etc Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 23/41] Executive: Export opendb_tests Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 24/41] sg-report-host-history: Add a debug print after sorting jobs Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 25/41] sg-report-host-history: Do the main query per host Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 26/41] sg-report-host-history: Rerganisation: Make mainquery per-host Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 27/41] sg-report-host-history: Rerganisation: Read old logs later Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 28/41] sg-report-host-history: Rerganisation: Change loops Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 29/41] sg-report-host-history: Drop a redundznt AND clause Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 30/41] sg-report-host-history: Fork Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 31/41] schema: Add index to help cs-bisection-step Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 32/41] adhoc-revtuple-generator: Fix an undef warning in a debug print Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 33/41] cs-bisection-step: Generalise qtxt_common_rev_ok Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 34/41] cs-bisection-step: Move an AND Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 35/41] cs-bisection-step: Break out qtxt_common_ok Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 36/41] cs-bisection-step: Use db_prepare a few times instead of ->do Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 37/41] cs-bisection-step: temporary table: Insert only rows we care about Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 38/41] SQL: Change LIKE E'...\\_...' to LIKE '...\_...' Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 39/41] cs-bisection-step: Add a debug print when we run dot(1) Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 40/41] cs-bisection-step: Lay out the revision tuple graph once Ian Jackson
2020-07-31 11:38 ` [OSSTEST PATCH v2 41/41] duration_estimator: Clarify recentflights query a bit Ian Jackson
2020-07-31 14:04   ` George Dunlap

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