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Peter Geoghegan c242baa4a8 Consider triggering VACUUM failsafe during scan. 
The wraparound failsafe mechanism added by commit 1e55e7d1 handled the
one-pass strategy case (i.e. the "table has no indexes" case) by adding
a dedicated failsafe check.  This made up for the fact that the usual
one-pass checks inside lazy_vacuum_all_indexes() cannot ever be reached
during a one-pass strategy VACUUM.

This approach failed to account for two-pass VACUUMs that opt out of
index vacuuming up-front.  The INDEX_CLEANUP off case in the only case
that works like that.

Fix this by performing a failsafe check every 4GB during the first scan
of the heap, regardless of the details of the VACUUM.  This eliminates
the special case, and will make the failsafe trigger more reliably.

Author: Peter Geoghegan <pg@bowt.ie>
Reported-By: Andres Freund <andres@anarazel.de>
Reviewed-By: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/20210424002921.pb3t7h6frupdqnkp@alap3.anarazel.de
2021-05-24 17:14:02 -07:00
config Update config.guess and config.sub 2021-04-21 16:33:40 +02:00
contrib Allow compute_query_id to be set to 'auto' and make it default 2021-05-15 14:13:09 -04:00
doc Doc: move some catalogs.sgml entries to the right place. 2021-05-24 18:03:47 -04:00
src Consider triggering VACUUM failsafe during scan. 2021-05-24 17:14:02 -07:00
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configure.ac Stamp 14beta1. 2021-05-17 16:11:18 -04:00
COPYRIGHT Update copyright for 2021 2021-01-02 13:06:25 -05:00
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README 

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.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download/

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
https://www.postgresql.org/download/.  For more information look at our
web site located at https://www.postgresql.org/.