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The introduction of min_wal_size & max_wal_size in 88e982302684 makes it feasible to increase the default upper bound in checkpoint size. Previously raising the default would lead to a increased disk footprint, even if more segments weren't beneficial. The low default of checkpoint size is one of common performance problem users have thus increasing the default makes sense. Setups where the increase in maximum disk usage is a problem will very likely have to run with a modified configuration anyway. Discussion: 54F4EFB8.40202@agliodbs.com, CA+TgmoZEAgX5oMGJOHVj8L7XOkAe05Gnf45rP40m-K3FhZRVKg@mail.gmail.com Author: Josh Berkus, after a discussion involving lots of people.
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/.