1d28812160
Commit 51f55b13a4 added a test where DROP DATABASE ... WITH (FORCE)
terminates a session holding a temporary table in the target database.
While exiting, the terminated session drops its temporary table and
commits, and the commit waits for a WAL flush behind the backlog
generated by the checksum workers. On machines with slow storage this
can exceed the five seconds DROP DATABASE waits for terminated backends
to exit, making the test fail with "database "dropmeforce" is being
accessed by other users", as observed on buildfarm member turaco.
To fix, use asynchronous commit in the terminated session, so that its
exit does not wait for a WAL flush, and checkpoint before the drop so
that the exit-time WAL records do not queue up behind the backlog.
Author: Zsolt Parragi <zsolt.parragi@percona.com>
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/361531e2-52b5-499c-a126-815f277bbef2@gmail.com
Backpatch-through: 19
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/19/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/19/installation.html.
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/.