4766438aa3
One comment of PgStat_TableCounts mentioned that its pending stats use memcmp() to check for the all-zero case if there is any activity. This is not true since 07e9e28b56, as pg_memory_is_all_zeros() is used. PgStat_FunctionCounts incorrectly documented that it relied on memcpy(). This has never been correct, and not relevant because function statistics do not have an all-zero check for pending stats. Checkpoint and bgwriter statistics have been always relying on memcmp() or pg_memory_is_all_zeros() (since 07e9e28b56 for the latter), and never mentioned the dependency on event counters for their all-zero checks. Let's document these properties, like the table statistics. Author: Bertrand Drouvot Discussion: https://postgr.es/m/Z1hNLvcPgVLPxCoc@ip-10-97-1-34.eu-west-3.compute.internal
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/.