6df2971d32
In ec34040af I added a mention that there was no point in setting maintenance_work_limit to anything higher than 1GB for vacuum, but that was incorrect as ginInsertCleanup() also looks at what maintenance_work_mem is set to during VACUUM and that's not limited to 1GB. Here I attempt to make it more clear that the limitation is only around the number of dead tuple identifiers that we can collect during VACUUM. I've also added a note to autovacuum_work_mem to mention this limitation. I didn't do that in ec34040af as I'd had some wrong-headed ideas about just limiting the maximum value for that GUC to 1GB. Author: David Rowley Discussion: https://postgr.es/m/CAApHDvpGwOAvunp-E-bN_rbAs3hmxMoasm5pzkYDbf36h73s7w@mail.gmail.com Backpatch-through: 9.6, same as ec34040af
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/.