1f7e9ba3ac
This commit fixes three issues: 1) When a disabled subscription is created with retain_dead_tuples set to true, the launcher is not woken up immediately, which may lead to delays in creating the conflict detection slot. Creating the conflict detection slot is essential even when the subscription is not enabled. This ensures that dead tuples are retained, which is necessary for accurately identifying the type of conflict during replication. 2) Conflict-related data was unnecessarily retained when the subscription does not have a table. 3) Conflict-relevant data could be prematurely removed before applying prepared transactions on the publisher that are in the commit critical section. This issue occurred because the backend executing COMMIT PREPARED was not accounted for during the computation of oldestXid in the commit phase on the publisher. As a result, the subscriber could advance the conflict slot's xmin without waiting for such COMMIT PREPARED transactions to complete. We fixed this issue by identifying prepared transactions that are in the commit critical section during computation of oldestXid in commit phase. Author: Zhijie Hou <houzj.fnst@fujitsu.com> Reviewed-by: shveta malik <shveta.malik@gmail.com> Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com> Reviewed-by: Nisha Moond <nisha.moond412@gmail.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Discussion: https://postgr.es/m/OS9PR01MB16913DACB64E5721872AA5C02943BA@OS9PR01MB16913.jpnprd01.prod.outlook.com Discussion: https://postgr.es/m/OS9PR01MB16913F67856B0DA2A909788129400A@OS9PR01MB16913.jpnprd01.prod.outlook.com
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/.