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Invoke vacuum(), as well as "work item" processing, in the PortalContext that do_autovacuum() has manufactured, which will be reset before each such invocation. This ensures cleanup of any memory leaked by these operations. It also avoids the rather dangerous practice of calling vacuum() in a context that vacuum() itself will destroy while it runs. There's no known live bug there, but it's not hard to imagine introducing one if we leave it like this. Tom Lane, reviewed by Michael Paquier and Alvaro Herrera Discussion: https://postgr.es/m/13849.1506114543@sss.pgh.pa.us
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/.