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77a1d1e798
Commit a892234f830e832110f63fc0a2afce2fb21d1584 added a second bit per page to the visibility map, which still seems like a good idea, but it also added a second page-level bit alongside PD_ALL_VISIBLE to track whether the visibility map bit was set. That no longer seems like a clever plan, because we don't really need that bit for anything. We always clear both bits when the page is modified anyway. Patch by me, reviewed by Kyotaro Horiguchi and Masahiko Sawada.
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/.