f7e4d5c64f
Adjust the documentation's coverage of aggressive VACUUMs to make it clearer that aggressive vacuuming isn't always strictly necessary. It's possible for non-aggressive VACUUMs to advance relfrozenxid/relminmxid without fail, given the right workload conditions. While this has always been true, it matters more with recent and pending improvements to VACUUM. These improvements make non-aggressive vacuuming more likely to advance relfrozenxid/relminmxid in practice. While this is an unrelated improvement to the docs, formally speaking, it still doesn't seem worth backpatching. So don't backpatch.
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/.