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Add basic NUMA awareness routines, using a minimal src/port/pg_numa.c portability wrapper and an optional build dependency, enabled by --with-libnuma configure option. For now this is Linux-only, other platforms may be supported later. A built-in SQL function pg_numa_available() allows checking NUMA support, i.e. that the server was built/linked with the NUMA library. The main function introduced is pg_numa_query_pages(), which allows determining the NUMA node for individual memory pages. Internally the function uses move_pages(2) syscall, as it allows batching, and is more efficient than get_mempolicy(2). Author: Jakub Wartak <jakub.wartak@enterprisedb.com> Co-authored-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Álvaro Herrera <alvherre@alvh.no-ip.org> Reviewed-by: Tomas Vondra <tomas@vondra.me> Discussion: https://postgr.es/m/CAKZiRmxh6KWo0aqRqvmcoaX2jUxZYb4kGp3N%3Dq1w%2BDiH-696Xw%40mail.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/.