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PgStat_StatTabEntry and AutoVacOpts structs were leaked until the end of the autovacuum worker's run, which is bad news if there are a lot of relations in the database. Note: pfree'ing the PgStat_StatTabEntry structs here seems a bit risky, because pgstat_fetch_stat_tabentry_ext does not guarantee anything about whether its result is long-lived. It appears okay so long as autovacuum forces PGSTAT_FETCH_CONSISTENCY_NONE, but I think that API could use a re-think. Also ensure that the VacuumRelation structure passed to vacuum() is in recoverable storage. Back-patch to v15 where we started to manage table statistics this way. (The AutoVacOpts leakage is probably older, but I'm not excited enough to worry about just that part.) Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/285483.1746756246@sss.pgh.pa.us Backpatch-through: 15
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/.