da9517fb3a
Reset btpo_cycleid to 0 in btree_xlog_vacuum for consistency with _bt_delitems_vacuum (the corresponding original execution code). This makes things neater. There might be some performance benefit to being consistent like this. When btvacuumpage doesn't call _bt_delitems_vacuum, it can still proactively reset btpo_cycleid to 0 via a separate hint-like update mechanism (it does so whenever it sees that it isn't already set to 0). And so it's possible that being consistent about resetting btpo_cycleid like this will save work later on, after standby promotion: subsequent VACUUMs won't need to clear btpo_cycleid using the hint-like update mechanism as often as they otherwise would. Author: Peter Geoghegan <pg@bowt.ie> Reviewed-By: Andrey Borodin <x4mmm@yandex-team.ru> Discussion: https://postgr.es/m/CAH2-Wz=+LDFxn9NZyEsCo8ifcyKt6+n-VLyygySEHgMz+oynqw@mail.gmail.com
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/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/.