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Very occasionally the stats test failed due to the number of sessions not
being updated yet. Likely this requires that there is contention on the
database's stats entry. Solve this by forcing pending stats to be flushed
before fetching the stats.
I verified that there are no other test failures after making
pgstat_report_stat() only flush stats when force = true.
Per message from Tom Lane and buildfarm member crake.
Discussion: https://postgr.es/m/3428246.1663271992@sss.pgh.pa.us
Backpatch: 15-, where 5264add784 added the test
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/.