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The documentation stated that existing connections would continue to function normally after the OOM killer terminated the postmaster. In fact, those connections eventually terminate when server processes detect the postmaster's death. Clarify that the OOM killer can terminate either the postmaster or a child process. If the postmaster is killed, the server must be restarted. If a child process is killed, PostgreSQL typically terminates the remaining connections and either recovers automatically or shuts down, depending on restart_after_crash. Backpatch to all supported versions. Author: Takeshi Ideriha <iderihatakeshi@gmail.com> Reviewed-by: Manuel Reyes Bravo <manuelreyesbravo@gmail.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/ce269321-a7f4-48f4-a9ca-a4a4983b9fd6@gmail.com Backpatch-through: 14
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/.