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Previously, walreceiver always closed the currently-opened WAL segment and created its archive notification file, after it finished writing the current segment up and received any WAL data that should be written into the next segment. If walreceiver exited just before any WAL data in the next segment arrived at standby, it did not create the archive notification file of the current segment even though that's known completed. This behavior could cause WAL archiving of the segment to be delayed until subsequent restartpoints or checkpoints created its notification file. To fix the issue, this commit changes walreceiver so that it creates an archive notification file of a current WAL segment immediately if that's known completed before receiving next WAL data. Back-patch to all supported branches. Reported-by: Kyotaro Horiguchi Author: Fujii Masao Reviewed-by: Kyotaro Horiguchi Discussion: https://postgr.es/m/20200630.165503.1465894182551545886.horikyota.ntt@gmail.com |
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| README.git | ||
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/.