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While processing toast changes in logical decoding, we rejigger the tuple change to point to in-memory toast tuples instead to on-disk toast tuples. And, to make sure the memory accounting is correct, we were subtracting the old change size and then after re-computing the new tuple, re-adding its size at the end. Now, if there is any error before we add the new size, we will release the changes and that will update the accounting info (subtracting the size from the counters). And we were underflowing there which leads to an assertion failure in assert enabled builds and wrong memory accounting in reorder buffer otherwise. Author: Bertrand Drouvot Reviewed-by: Amit Kapila Backpatch-through: 13, where memory accounting was introduced Discussion: https://postgr.es/m/92b0ee65-b8bd-e42d-c082-4f3f4bf12d34@amazon.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/.