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Tom Lane 141cd0ef0b Improve contrib/amcheck's tests for CREATE INDEX CONCURRENTLY. 
Commits fdd965d07 and 3cd9c3b92 tested CREATE INDEX CONCURRENTLY by
launching two separate pgbench runs concurrently.  This was needed so
that only a single client thread would run CREATE INDEX CONCURRENTLY,
avoiding deadlock between two CICs.  However, there's a better way,
which is to use an advisory lock to prevent concurrent CICs.  That's
better in part because the test code is shorter and more readable, but
mostly because it automatically scales things to launch an appropriate
number of CICs relative to the number of INSERT transactions.
As committed, typically half to three-quarters of the CIC transactions
were pointless because the INSERT transactions had already stopped.

In passing, remove background_pgbench, which was added to support
these tests and isn't needed anymore.  We can always put it back
if we find a use for it later.

Back-patch to v12; older pgbench versions lack the
conditional-execution features needed for this method.

Tom Lane and Andrey Borodin

Discussion: https://postgr.es/m/139687.1635277318@sss.pgh.pa.us
2021-10-28 11:45:14 -04:00
config jit: configure: Explicitly reference 'native' component. 2020-12-07 18:39:32 -08:00
contrib Improve contrib/amcheck's tests for CREATE INDEX CONCURRENTLY. 2021-10-28 11:45:14 -04:00
doc doc: Fix link to SELinux user guide in sepgsql page 2021-10-28 09:26:21 +09:00
src Improve contrib/amcheck's tests for CREATE INDEX CONCURRENTLY. 2021-10-28 11:45:14 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.gitattributes Add XSL stylesheet to fix up SVG files 2019-06-19 21:26:42 +02:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Remove configure-time probe for DocBook DTD. 2020-11-30 15:24:13 -05:00
configure Stamp 12.8. 2021-08-09 16:50:41 -04:00
configure.in Stamp 12.8. 2021-08-09 16:50:41 -04:00
COPYRIGHT Update copyright for 2021 2021-01-02 13:06:24 -05:00
GNUmakefile.in Add new make targets world-bin and install-world-bin 2021-07-01 14:51:54 -04:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -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/.