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feec1b2d5a
get_database_list() failed to restore the caller's memory context, instead leaving current context set to TopMemoryContext which is how CommitTransactionCommand() leaves it. The callers both think they are using short-lived contexts, for the express purpose of not having to worry about cleaning up individual allocations. The net effect therefore is that supposedly short-lived allocations could accumulate indefinitely in the launcher's TopMemoryContext. Although this has been broken for a long time, it seems we didn't have any obvious memory leak here until v15's rearrangement of the stats logic. I (tgl) am not entirely convinced that there's no other leak at all, though, and we're surely at risk of adding one in future back-patched fixes. So back-patch to all supported branches, even though this may be only a latent bug in pre-v15. Reid Thompson Discussion: https://postgr.es/m/972a4e12b68b0f96db514777a150ceef7dcd2e0f.camel@crunchydata.com |
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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/.