3d3b887281
It was possible to trigger read_stream_begin_relation's
assertion that it calculated nonzero max_pinned_buffers,
in scenarios with unreasonably small numbers of buffers.
There seems to be no visible problem in non-Assert builds.
The bug occurs only in v17 (the first branch containing
this logic), because commit 92fc6856c replaced that Assert
with a runtime clamp. I won't risk back-patching that entire
commit, but let's copy just this minimal fix.
Bug: #19551
Reported-by: Roman Zharkov <r.zharkov@postgrespro.ru>
Author: Thomas Munro <thomas.munro@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/19551-d4a55b8fe81db4f2@postgresql.org
Backpatch-through: 17 only
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/17/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/17/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/.