2973b1cd3a
This commit changes stats kinds to have the following bounds, making their handling in core cheaper by default: - PGSTAT_KIND_CUSTOM_MIN 128 -> 24 - PGSTAT_KIND_MAX 256 -> 32 The original numbers were rather high, and showed an impact on performance in pgstat_report_stat() for the case of simple queries with its early-exit path if there are no pending statistics to flush. This logic will be improved more in a follow-up commit to bring the performance of pgstat_report_stat() on par with v17 and older versions. Lowering the bounds is a change worth doing on its own, independently of the other improvement. These new numbers should be enough to leave some room for the following years for built-in and custom stats kinds, with stable ID numbers. At least that should be enough to start with this facility for extension developers. It can be always increased in the tree depending on the requirements wanted. Per discussion with Andres Freund and Bertrand Drouvot. Discussion: https://postgr.es/m/eb224uegsga2hgq7dfq3ps5cduhpqej7ir2hjxzzozjthrekx5@dysei6buqthe Backpatch-through: 18 |
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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/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/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/.