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In a corner case, a btree page was allocated during a clean-up operation that could cause the tracking of the largest contiguous span of free space to get out of whack. That was supposed to be prevented by the use of the "soft" flag to avoid allocating internal pages during incidental clean-up work, but the flag was ignored in the case where the FPM was promoted from singleton format to btree format. Repair. Remove an obsolete comment in passing. Back-patch to 10, where freepage.c arrived (as support for dsa.c). Author: Robert Haas Diagnosed-by: Thomas Munro and Robert Haas Reported-by: Justin Pryzby, Rick Otten, Sand Stone, Arne Roland and others Discussion: https://postgr.es/m/CAMAYy4%2Bw3NTBM5JLWFi8twhWK4%3Dk_5L4nV5%2BbYDSPu8r4b97Zg%40mail.gmail.com |
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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/.