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Tom Lane 3aafc030a5 Reduce memory consumption for pending invalidation messages. 
The existing data structures in inval.c are fairly inefficient for
the common case of a command or subtransaction that registers a small
number of cache invalidation events.  While this doesn't matter if we
commit right away, it can build up to a lot of bloat in a transaction
that contains many DDL operations.  By making a few more assumptions
about the expected use-case, we can switch to a representation using
densely-packed arrays.  Although this eliminates some data-copying,
it doesn't seem to make much difference time-wise.  But the space
consumption decreases substantially.

Patch by me; thanks to Nathan Bossart for review.

Discussion: https://postgr.es/m/2380555.1622395376@sss.pgh.pa.us
 		2021-08-16 16:48:25 -04:00
config Remove configure-time thread safety checking (thread_test.c). 2021-07-24 12:16:39 -04:00
contrib Fix failure of btree_gin indexscans with "char" type and </<= operators. 2021-08-10 18:10:29 -04:00
doc Clarify initdb --sync-only help message and docs 2021-08-16 13:38:01 +02:00
src Reduce memory consumption for pending invalidation messages. 2021-08-16 16:48:25 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Add pgindent commit to git-blame-ignore-revs file. 2021-06-28 09:22:24 -07:00
.gitattributes gitattributes: Add new entry to silence whitespace error 2021-06-05 07:57:31 +02:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
COPYRIGHT Update copyright for 2021 2021-01-02 13:06:25 -05:00
GNUmakefile.in add missing tag from commit b8c4261e5e 2021-07-01 15:47:46 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00
aclocal.m4 Remove configure-time probe for DocBook DTD. 2020-11-30 15:24:13 -05:00
configure Remove configure-time thread safety checking (thread_test.c). 2021-07-24 12:16:39 -04:00
configure.ac Remove configure-time thread safety checking (thread_test.c). 2021-07-24 12:16:39 -04:00

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/.