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Presently, archive status files are durably renamed from .ready to .done to indicate that a file has been archived. Persisting this rename to disk accounts for a significant amount of the overhead associated with archiving. While durably renaming the file prevents re-archiving in most cases, archive commands and libraries must already gracefully handle attempts to re-archive the last archived file after a crash (e.g., a crash immediately after archive_command exits but before the server renames the status file). This change reduces the amount of overhead associated with archiving by using rename() instead of durable_rename() to rename the archive status files. As a consequence, the server is more likely to attempt to re-archive files after a crash, but as noted above, archive commands and modules are already expected to handle this. It is also possible that the server will attempt to re- archive files that have been removed or recycled, but the archiver already handles this, too. Author: Nathan Bossart Reviewed-by: Kyotaro Horiguchi, Fujii Masao Discussion: https://postgr.es/m/20220222011948.GA3850532@nathanxps13
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/.