Horton

Optimize vacuuming of relations with no indexes.

Robert Haas <rhaas@postgresql.org>

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Commit: c120550edb86b8e0d785063501c259e29aa80eb6
Author: Robert Haas <rhaas@postgresql.org>
Date: 2024-01-18T15:03:42Z
Releases: 17.0 
Optimize vacuuming of relations with no indexes.

If there are no indexes on a relation, items can be marked LP_UNUSED
instead of LP_DEAD when pruning. This significantly reduces WAL
volume, since we no longer need to emit one WAL record for pruning
and a second to change the LP_DEAD line pointers thus created to
LP_UNUSED.

Melanie Plageman, reviewed by Andres Freund, Peter Geoghegan, and me

Discussion: https://postgr.es/m/CAAKRu_bgvb_k0gKOXWzNKWHt560R0smrGe3E8zewKPs8fiMKkw%40mail.gmail.com

Files

PathChange+/−
src/backend/access/heap/pruneheap.c modified +68 −12
src/backend/access/heap/vacuumlazy.c modified +39 −90
src/include/access/heapam.h modified +1 −0

Discussion