d69b06e5ab
add323da40 consolidated visibility map updates into XLOG_HEAP2_PRUNE
records. It assumed that a record setting the visibility map would
always modify the VM page during replay. That is not true when the
requested bits are already set on the standby.
Primary and standby visibility maps can diverge for several reasons.
This issue was exposed by a CREATE DATABASE ... STRATEGY WAL_LOG bug.
After a standby with an out-of-date VM is promoted, VACUUM may set bits
that were already present on the former primary. When the former primary
later replays that record as a standby, visibilitymap_set() is a no-op.
Restore visibilitymap_set()'s former API, which returns the state of the
VM bits before setting the requested flags. Use that result to set the
VM page LSN only when the visibilitymap_set() updates the page.
Reported-by: Rogers Wang <rogers.ww@qq.com>
Discussion: https://postgr.es/m/tencent_2E870046716FD94285045E96505A2D4E2908%40qq.com
Backpatch-through: 19PostgreSQL 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/19/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/19/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/.