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92ebe509e3
The table-skipping logic in autovacuum would fail to consider that multiple workers could be processing the same shared catalog in different databases. This normally wouldn't be a problem: firstly because autovacuum workers not for wraparound would simply ignore tables in which they cannot acquire lock, and secondly because most of the time these tables are small enough that even if multiple for-wraparound workers are stuck in the same catalog, they would be over pretty quickly. But in cases where the catalogs are severely bloated it could become a problem. Backpatch all the way back, because the problem has been there since the beginning. Reported by Ondřej Světlík Discussion: https://www.postgresql.org/message-id/572B63B1.3030603%40flexibee.eu https://www.postgresql.org/message-id/572A1072.5080308%40flexibee.eu |
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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. PostgreSQL has many language interfaces, many of which are listed here: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.