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When there are no indexes on a table, we vacuum each heap block after pruning it and then update the freespace map. Periodically, we also vacuum the freespace map. This was done while unnecessarily holding a lock on the heap page. Release the lock before calling FreeSpaceMapVacuumRange() and, while we're at it, ensure the range includes the heap block we just vacuumed. There are no known deadlocks or other similar issues, therefore don't backpatch. It's certainly not good to do all this work under a lock, but it's not frequently reached, making it not worth the risk of backpatching. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/CAAKRu_YiL%3D44GvGnt1dpYouDSSoV7wzxVoXs8m3p311rp-TVQQ%40mail.gmail.com |
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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. 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, 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/.