Peter Geoghegan b0f7425ec2 Explain pruning pgstats accounting subtleties. ...

Add a comment explaining why the pgstats accounting used during
opportunistic heap pruning operations (to maintain the current number of
dead tuples in the relation) needs to compensate by subtracting away the
number of new LP_DEAD items.  This is needed so it can avoid completely
forgetting about tuples that become LP_DEAD items during pruning -- they
should still count.

It seems more natural to discuss this issue at the only relevant call
site (opportunistic pruning), since the same issue does not apply to the
only other caller (the VACUUM call site).  Move everything there too.

Author: Peter Geoghegan <pg@bowt.ie>
Discussion: https://postgr.es/m/CAH2-Wzm7f+A6ej650gi_ifTgbhsadVW5cujAL3punpupHff5Yg@mail.gmail.com

2021-11-12 19:45:58 -08:00

..

backend

Explain pruning pgstats accounting subtleties.

2021-11-12 19:45:58 -08:00

bin

Make psql's \password default to CURRENT_USER, not PQuser(conn).

2021-11-12 14:55:32 -05:00

common

Fix buffer overrun in unicode string normalization with empty input

2021-11-11 15:00:59 +09:00

fe_utils

Replace unicode characters in comments with ascii

2021-11-01 22:42:49 +01:00

include

Explain pruning pgstats accounting subtleties.

2021-11-12 19:45:58 -08:00

interfaces

Remove check for accept() argument types

2021-11-09 15:35:26 +01:00

makefiles

Add NO_INSTALL option to pgxs

2021-05-27 13:58:29 +02:00

pl

plpgsql: report proper line number for errors in variable initialization.

2021-10-31 12:43:47 -04:00

port

Remove check for accept() argument types

2021-11-09 15:35:26 +01:00

template

Further tweaking of PG_SYSROOT heuristics for macOS.

2021-01-20 12:07:23 -05:00

test

Document PG_TEST_NOCLEAN in TAP test README

2021-11-12 21:38:10 +01:00

timezone

Update time zone data files to tzdata release 2021e.

2021-10-29 11:38:18 -04:00

tools

Remove check for accept() argument types

2021-11-09 15:35:26 +01:00

tutorial

doc: Prefer explicit JOIN syntax over old implicit syntax in tutorial

2021-04-08 10:51:26 +02:00

.gitignore

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DEVELOPERS

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Makefile

Remove the option to build thread_test.c outside configure.

2020-10-21 12:08:48 -04:00

Makefile.global.in

Add support for LZ4 compression in pg_receivewal

2021-11-05 11:33:25 +09:00

Makefile.shlib

AIX: Fix missing libpq symbols by respecting SHLIB_EXPORTS.

2021-09-06 11:27:59 -07:00

nls-global.mk

Add errhint_plural() function and make use of it

2021-03-31 09:16:25 +02:00