This GUC controls if cumulative statistics are enabled or not in the module. Custom statistics require the module to be loaded with shared_preload_libraries, hence this GUC is made PGC_POSTMASTER. By default, the stats are disabled. 001_stats.pl is updated to enable the statistics, as it is the only area where these are required now. This will be used by an upcoming change for the injection point test added by 768a9fd5535f where stats should not be used, as the test runs a point callback in a critical section. And the module injection_points will need to be loaded with shared_preload_libraries there. Per discussion with Álvaro Herrera. Author: Michael Paquier Discussion: https://postgr.es/m/ZsUnJUlSOBNAzwW1@paquier.xyz
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.