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of timeline, take advantage of that in walreceiver. Startup process is still in control of choosign the target timeline, by scanning the timeline history files present in pg_xlog, but walreceiver now uses the next timeline's ID to fetch its history file immediately after it has finished streaming the old timeline. Before, the standby would first try to restart streaming on the old timeline, which fetches the missing timeline history file as a side-effect, and only then restart from the new timeline. This patch eliminates the extra iteration, which speeds up the timeline switch and reduces the noise in the log caused by the extra restart on the old timeline.
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/.