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There were several oversights in recovery code where COMMIT/ABORT PREPARED records were ignored: * pg_last_xact_replay_timestamp() (wasn't updated for 2PC commits) * recovery_min_apply_delay (2PC commits were applied immediately) * recovery_target_xid (recovery would not stop if the XID used 2PC) The first of those was reported by Sergiy Zuban in bug #11032, analyzed by Tom Lane and Andres Freund. The bug was always there, but was masked before commit d19bd29f07aef9e508ff047d128a4046cc8bc1e2, because COMMIT PREPARED always created an extra regular transaction that was WAL-logged. Backpatch to all supported versions (older versions didn't have all the features and therefore didn't have all of the above bugs).
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.