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When spilling transaction data to disk a simple typo caused the output file to be closed and reopened for every serialized change. That happens to not have a huge impact on linux, which is why it probably wasn't noticed so far, but on windows that appears to trigger actual disk writes after every change. Not fun. The bug fortunately does not have any impact besides speed. A change could end up being in the wrong segment (last instead of next), but since we read all files to the end, that's just ugly, not really problematic. It's not a problem to upgrade, since transaction spill files do not persist across restarts. Bug: #13484 Reported-By: Olivier Gosseaume Discussion: 20150703090217.1190.63940@wrigleys.postgresql.org Backpatch to 9.4, where logical decoding was added.
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/.