3cd1ba147e
Recovery does not achieve its goal of zeroing all pg_multixact entries whose accompanying WAL records never reached disk. Remove that claim and justify its expendability. Detail the need for TrimMultiXact(), which has little in common with the TrimCLOG() rationale. Merge two tightly-related comments. Stop presenting pg_multixact as specific to heap_lock_tuple(); PostgreSQL 9.3 extended its use to heap_update(). Noticed while investigating a report from Andres Freund.
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/.