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Michael Paquier 93f08dc92c Fix shmem allocation of fixed-sized custom stats kind
StatsShmemSize(), that computes the shmem size needed for pgstats,
includes the amount of shared memory wanted by all the custom stats
kinds registered.  However, the shared memory allocation was done by
ShmemAlloc() in StatsShmemInit(), meaning that the space reserved was
not used, wasting some memory.

These extra allocations would show up under "<anonymous>" in
pg_shmem_allocations, as the allocations done by ShmemAlloc() are not
tracked by ShmemIndexEnt.

Issue introduced by 7949d95945.

Author: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/04b04387-92f5-476c-90b0-4064e71c5f37@iki.fi
Backpatch-through: 18
2026-04-07 11:59:54 +09:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
contrib Avoid memory leak on error while parsing pg_stat_statements dump file 2026-03-27 12:21:29 +02:00
doc doc: Add missing description for DROP SUBSCRIPTION IF EXISTS. 2026-04-01 09:48:48 -05:00
src Fix shmem allocation of fixed-sized custom stats kind 2026-04-07 11:59:54 +09:00
.abi-compliance-history Update .abi-compliance-history for AddRelationNotNullConstraints(). 2026-02-21 13:08:44 +01:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:53 -04:00
.cirrus.tasks.yml Fix typo 2026-01-07 15:48:45 +01:00
.cirrus.yml ci: Per-repo configuration for manually trigger tasks 2025-08-14 11:33:44 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add script to keep .editorconfig in sync with .gitattributes 2025-02-01 10:09:45 +01:00
.git-blame-ignore-revs Add previous commit to .git-blame-ignore-revs. 2025-10-21 10:02:19 -05:00
.gitattributes Fix git whitespace warning 2025-08-15 10:32:22 +02:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
.mailmap Add a Git .mailmap file 2024-11-05 13:56:02 +01:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
configure.ac Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
COPYRIGHT Update copyright for 2026 2026-01-01 13:24:10 -05:00
GNUmakefile.in Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Adapt REL_18_STABLE to its new status as a stable branch 2025-06-29 23:00:00 -04:00
meson.build Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
meson_options.txt Add support for basic NUMA awareness 2025-04-07 23:08:17 +02:00
README.md Adapt REL_18_STABLE to its new status as a stable branch 2025-06-29 23:00:00 -04:00

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.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.