5698f07947
Commit 1de58df4, which added page-level freezing, taught VACUUM to reuse each page's "set-visibility-map" snapshotConflictHorizon for freezing (at least in the vast majority of cases where freezing went ahead). This made VACUUM FREEZE much less prone to generating recovery conflicts on standbys; VACUUM FREEZE became only slightly more likely to cause recovery conflicts than an equivalent VACUUM. Update old documentation that specifically warned of the likelihood of recovery conflicts from VACUUM FREEZE. Explain the same general issue (the issue of VACUUM generating recovery conflicts even in the absence of dead row cleanup) using the example of conflicts caused by VISIBLE WAL records.
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/.