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This back-ports commitsc8ba697a4bande5db11c558, which fix one definite and one speculative bug in gistchoose, and make the code a lot more intelligible as well. In 9.2 only, this also affects the largely-copied-and-pasted logic in gistRelocateBuildBuffersOnSplit. The impact of the bugs was that the functions might make poor decisions as to which index tree branch to push a new entry down into, resulting in GiST index bloat and poor performance. The fixes rectify these decisions for future insertions, but a REINDEX would be needed to clean up any existing index bloat. Alexander Korotkov, Robert Haas, Tom Lane
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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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/.