f7700080dc
d96f87332b folded COPY FREEZE visibility map updates into
XLOG_HEAP2_MULTI_INSERT records. Unlike the former XLOG_HEAP2_VISIBLE
redo path, multi-insert redo only updated the FSM when the record did
not contain a heap page FPI and the heap page had less than 20% free
space.
This can leave all-frozen pages with missing or stale FSM entries on a
standby. After promotion, vacuum will skip those pages, preventing
their free space from being discovered.
When a multi-insert record sets the page all-frozen, record the heap
page's free space unconditionally.
Reported-by: Melanie Plageman <melanieplageman@gmail.com>
Discussion: https://postgr.es/m/CAAKRu_bS3nfMJCF2fjE%2Bceb5-t%3D2p_VPMk2PWuVomrOFxg5DGQ%40mail.gmail.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/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/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/.