a367c433ad
Replace dynahash with simplehash for the per-backend PrivateRefCountHash overflow table. Simplehash generates inlined, open-addressed lookup code, avoiding the per-call overhead of dynahash that becomes noticeable when many buffers are pinned with a CPU-bound workload. Motivated by testing of the index prefetching patch, which pins many more buffers concurrently than typical index scans. Author: Peter Geoghegan <pg@bowt.ie> Suggested-by: Andres Freund <andres@anarazel.de> Reviewed-By: Tomas Vondra <tomas@vondra.me> Reviewed-By: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/CAH2-Wz=g=JTSyDB4UtB5su2ZcvsS7VbP+ZMvvaG6ABoCb+s8Lw@mail.gmail.com
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/.