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Currently while decoding changes, if the number of changes exceeds a certain threshold, we spill those to disk. And this happens for each (sub)transaction. Now, while reading all these files, we don't close them until we read all the files. While reading these files, if the number of such files exceeds the maximum number of file descriptors, the operation errors out. Use PathNameOpenFile interface to open these files as that internally has the mechanism to release kernel FDs as needed to get us under the max_safe_fds limit. Reported-by: Amit Khandekar Author: Amit Khandekar Reviewed-by: Amit Kapila Backpatch-through: 9.4 Discussion: https://postgr.es/m/CAJ3gD9c-sECEn79zXw4yBnBdOttacoE-6gAyP0oy60nfs_sabQ@mail.gmail.com
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/.