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Concurrent autovacuums running with the main regression test suite could cause the tests with VACUUM (SKIP_LOCKED) to generate randomly WARNING messages. For these tests, set client_min_messages to ERROR to get rid of those random failures, as disabling autovacuum for the relations operated would not completely close the failure window. For isolation tests, disable autovacuum for the relations vacuumed with SKIP_LOCKED. The tests are designed so as LOCK commands are taken in a first session before running a concurrent VACUUM (SKIP_LOCKED) in a second to generate WARNING messages, but a concurrent autovacuum could cause the tests to be slower. Reported-by: Tom Lane Author: Michael Paquier Reviewed-by: Andres Freund, Tom Lane Discussion: https://postgr.es/m/25294.1573077278@sss.pgh.pa.us Backpatch-through: 12
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/.