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When -C/--connect option is specified, pgbench establishes and closes the connection for each transaction. In this case pgbench needs to measure the times taken for all those connections and disconnections, to include the average connection time in the benchmark result. But previously pgbench could not measure those disconnection delays. To fix the bug, this commit makes pgbench measure the disconnection delays whenever the connection is closed at the end of transaction, if -C/--connect option is specified. Back-patch to v14. Per discussion, we concluded not to back-patch to v13 or before because changing that behavior in stable branches would surprise users rather than providing benefits. Author: Yugo Nagata Reviewed-by: Fabien COELHO, Tatsuo Ishii, Asif Rehman, Fujii Masao Discussion: https://postgr.es/m/20210614151155.a393bc7d8fed183e38c9f52a@sraoss.co.jp
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/.