postgresql

mirror of https://git.postgresql.org/git/postgresql.git synced 2024-08-31 22:57:21 +02:00

History

Peter Geoghegan 9f3665fbfc Don't consider newly inserted tuples in nbtree VACUUM. Remove the entire idea of "stale stats" within nbtree VACUUM (stop caring about stats involving the number of inserted tuples). Also remove the vacuum_cleanup_index_scale_factor GUC/param on the master branch (though just disable them on postgres 13). The vacuum_cleanup_index_scale_factor/stats interface made the nbtree AM partially responsible for deciding when pg_class.reltuples stats needed to be updated. This seems contrary to the spirit of the index AM API, though -- it is not actually necessary for an index AM's bulk delete and cleanup callbacks to provide accurate stats when it happens to be inconvenient. The core code owns that. (Index AMs have the authority to perform or not perform certain kinds of deferred cleanup based on their own considerations, such as page deletion and recycling, but that has little to do with pg_class.reltuples/num_index_tuples.) This issue was fairly harmless until the introduction of the autovacuum_vacuum_insert_threshold feature by commit `b07642db`, which had an undesirable interaction with the vacuum_cleanup_index_scale_factor mechanism: it made insert-driven autovacuums perform full index scans, even though there is no real benefit to doing so. This has been tied to a regression with an append-only insert benchmark [1]. Also have remaining cases that perform a full scan of an index during a cleanup-only nbtree VACUUM indicate that the final tuple count is only an estimate. This prevents vacuumlazy.c from setting the index's pg_class.reltuples in those cases (it will now only update pg_class when vacuumlazy.c had TIDs for nbtree to bulk delete). This arguably fixes an oversight in deduplication-related bugfix commit `48e12913`. [1] https://smalldatum.blogspot.com/2021/01/insert-benchmark-postgres-is-still.html Author: Peter Geoghegan <pg@bowt.ie> Reviewed-By: Masahiko Sawada <sawada.mshk@gmail.com> Discussion: https://postgr.es/m/CAD21AoA4WHthN5uU6+WScZ7+J_RcEjmcuH94qcoUPuB42ShXzg@mail.gmail.com Backpatch: 13-, where autovacuum_vacuum_insert_threshold was added.		2021-03-10 16:27:01 -08:00
..
authentication	Update copyright for 2021	2021-01-02 13:06:25 -05:00
examples	libpq: Remove deprecated connection parameters authtype and tty	2021-03-09 15:01:22 +01:00
isolation	Fix permission checks on constraint violation errors on partitions.	2021-02-08 11:01:51 +02:00
kerberos	Don't clobber the calling user's credentials cache in Kerberos test.	2021-01-25 14:53:13 -05:00
ldap	Update copyright for 2021	2021-01-02 13:06:25 -05:00
locale	Clean up after tests in src/test/locale/.	2020-11-28 16:08:36 -05:00
mb	Fix MB regression tests for WAL-logging of hash indexes.	2017-03-15 07:25:36 -04:00
modules	Fix semantics of regular expression back-references.	2021-03-02 11:34:53 -05:00
perl	Update copyright for 2021	2021-01-02 13:06:25 -05:00
recovery	Close psql processes gracefully in recovery tests	2021-03-04 13:23:41 -05:00
regress	Don't consider newly inserted tuples in nbtree VACUUM.	2021-03-10 16:27:01 -08:00
ssl	Revert changes for SSL compression in libpq	2021-03-10 09:35:42 +09:00
subscription	Remove the unnecessary PrepareWrite in pgoutput.	2021-02-16 07:26:50 +05:30
Makefile	Introduce --with-ssl={openssl} as a configure option	2021-02-01 19:19:44 +09:00
README	Remove the option to build thread_test.c outside configure.	2020-10-21 12:08:48 -04:00

README

PostgreSQL tests
================

This directory contains a variety of test infrastructure as well as some of the
tests in PostgreSQL. Not all tests are here -- in particular, there are more in
individual contrib/ modules and in src/bin.

Not all these tests get run by "make check". Check src/test/Makefile to see
which tests get run automatically.

authentication/
  Tests for authentication (but see also below)

examples/
  Demonstration programs for libpq that double as regression tests via
  "make check"

isolation/
  Tests for concurrent behavior at the SQL level

kerberos/
  Tests for Kerberos/GSSAPI authentication and encryption

ldap/
  Tests for LDAP-based authentication

locale/
  Sanity checks for locale data, encodings, etc

mb/
  Tests for multibyte encoding (UTF-8) support

modules/
  Extensions used only or mainly for test purposes, generally not suitable
  for installing in production databases

perl/
  Infrastructure for Perl-based TAP tests

recovery/
  Test suite for recovery and replication

regress/
  PostgreSQL's main regression test suite, pg_regress

ssl/
  Tests to exercise and verify SSL certificate handling

subscription/
  Tests for logical replication