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vacuum() is used for both the VACUUM command and for autovacuum. There were many prechecks being done inside vacuum() that were just not relevant to autovacuum. Let's move the bulk of these into ExecVacuum() so that they're only executed when running the VACUUM command. This removes a small amount of overhead when autovacuum vacuums a table. While we are at it, allocate VACUUM's BufferAccessStrategy in ExecVacuum() and pass it into vacuum() instead of expecting vacuum() to make it if it's not already made by the calling function. To make this work, we need to create the vacuum memory context slightly earlier, so we now need to pass that down to vacuum() so that it's available for use in other memory allocations. Author: Melanie Plageman Reviewed-by: David Rowley Discussion: https://postgr.es/m/20230405211534.4skgskbilnxqrmxg@awork3.anarazel.de
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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.