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Two backend routines are added to allow extension to allocate and define custom wait events, all of these being allocated in the type "Extension": * WaitEventExtensionNew(), that allocates a wait event ID computed from a counter in shared memory. * WaitEventExtensionRegisterName(), to associate a custom string to the wait event ID allocated. Note that this includes an example of how to use this new facility in worker_spi with tests in TAP for various scenarios, and some documentation about how to use them. Any code in the tree that currently uses WAIT_EVENT_EXTENSION could switch to this new facility to define custom wait events. This is left as work for future patches. Author: Masahiro Ikeda Reviewed-by: Andres Freund, Michael Paquier, Tristan Partin, Bharath Rupireddy Discussion: https://postgr.es/m/b9f5411acda0cf15c8fbb767702ff43e@oss.nttdata.com |
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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/.