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postgresql/contrib/pg_stat_statements
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Fujii Masao 8d459762b1 Change default of pg_stat_statements.track_planning to off. 
Since v13 pg_stat_statements is allowed to track the planning time of
statements when track_planning option is enabled. Its default was on.

But this feature could cause more terrible spinlock contentions in
pg_stat_statements. As a result of this, Robins Tharakan reported that
v13 beta1 showed ~45% performance drop at high DB connection counts
(when compared with v12.3) during fully-cached SELECT-only test using
pgbench.

To avoid this performance regression by the default setting,
this commit changes default of pg_stat_statements.track_planning to off.

Back-patch to v13 where pg_stat_statements.track_planning was introduced.

Reported-by: Robins Tharakan
Author: Fujii Masao
Reviewed-by: Julien Rouhaud
Discussion: https://postgr.es/m/2895b53b033c47ccb22972b589050dd9@EX13D05UWC001.ant.amazon.com
 		2020-07-03 11:37:24 +09:00
..
expected Change default of pg_stat_statements.track_planning to off. 2020-07-03 11:37:24 +09:00
sql Change default of pg_stat_statements.track_planning to off. 2020-07-03 11:37:24 +09:00
.gitignore pg_stat_statements: Add .gitignore file for tests 2016-11-13 08:24:43 -05:00
Makefile Allow pg_stat_statements to track planning statistics. 2020-04-02 11:20:19 +09:00
pg_stat_statements--1.0--1.1.sql Fix typo in update scripts for some contrib modules. 2013-07-19 04:13:01 +09:00
pg_stat_statements--1.1--1.2.sql Keep pg_stat_statements' query texts in a file, not in shared memory. 2014-01-27 15:37:54 -05:00
pg_stat_statements--1.2--1.3.sql Add stats for min, max, mean, stddev times to pg_stat_statements. 2015-03-27 15:43:22 -04:00
pg_stat_statements--1.3--1.4.sql Update pg_stat_statements extension for parallel query. 2016-06-10 10:42:01 -04:00
pg_stat_statements--1.4--1.5.sql Default monitoring roles 2017-03-30 14:18:53 -04:00
pg_stat_statements--1.4.sql Update pg_stat_statements extension for parallel query. 2016-06-10 10:42:01 -04:00
pg_stat_statements--1.5--1.6.sql Revoke pg_stat_statements_reset() permissions 2018-09-25 09:55:44 +09:00
pg_stat_statements--1.6--1.7.sql Extend pg_stat_statements_reset to reset statistics specific to a 2019-01-11 08:50:09 +05:30
pg_stat_statements--1.7--1.8.sql Change the display of WAL usage statistics in Explain. 2020-05-05 08:00:53 +05:30
pg_stat_statements.c Change default of pg_stat_statements.track_planning to off. 2020-07-03 11:37:24 +09:00
pg_stat_statements.conf Add minimal set of regression tests for pg_stat_statements. 2016-11-12 05:01:48 -08:00
pg_stat_statements.control Allow pg_stat_statements to track planning statistics. 2020-04-02 11:20:19 +09:00