7a39f43d88
Add support for waiting on WAL write and flush LSNs in addition to the existing replay LSN wait type. This provides the foundation for extending the WAIT FOR command with MODE parameter. Key changes are following. - Add WAIT_LSN_TYPE_STANDBY_WRITE and WAIT_LSN_TYPE_STANDBY_FLUSH to WaitLSNType. - Add GetCurrentLSNForWaitType() to retrieve the current LSN for each wait type. - Add new wait events WAIT_EVENT_WAIT_FOR_WAL_WRITE and WAIT_EVENT_WAIT_FOR_WAL_FLUSH for pg_stat_activity visibility. - Update WaitForLSN() to use GetCurrentLSNForWaitType() internally. Discussion: https://postgr.es/m/CABPTF7UiArgW-sXj9CNwRzUhYOQrevLzkYcgBydmX5oDes1sjg%40mail.gmail.com Author: Xuneng Zhou <xunengzhou@gmail.com> Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Alvaro Herrera <alvherre@kurilemu.de>
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/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/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/.