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Tom Lane 3ac860f6b3 Fix NOTIFY to cope with I/O problems, such as out-of-disk-space. 
The LISTEN/NOTIFY subsystem got confused if SimpleLruZeroPage failed,
which would typically happen as a result of a write() failure while
attempting to dump a dirty pg_notify page out of memory.  Subsequently,
all attempts to send more NOTIFY messages would fail with messages like
"Could not read from file "pg_notify/nnnn" at offset nnnnn: Success".
Only restarting the server would clear this condition.  Per reports from
Kevin Grittner and Christoph Berg.

Back-patch to 9.0, where the problem was introduced during the
LISTEN/NOTIFY rewrite.
2012-06-29 00:51:44 -04:00
config Don't reject threaded Python on FreeBSD. 2012-02-20 16:21:35 -05:00
contrib In pg_upgrade, report pre-PG 8.1 plpython helper functions left in the 2012-06-13 12:34:03 -04:00
doc Update copyright year in forgotten places 2012-06-19 21:36:08 +03:00
src Fix NOTIFY to cope with I/O problems, such as out-of-disk-space. 2012-06-29 00:51:44 -04:00
.gitignore Add gitignore for mingw/cygwin build outputs 2011-06-09 18:11:47 +02:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Stamp 9.1.4. 2012-05-31 19:07:09 -04:00
configure.in Stamp 9.1.4. 2012-05-31 19:07:09 -04:00
COPYRIGHT Stamp copyrights for year 2011. 2011-01-01 13:18:15 -05:00
GNUmakefile.in Build src/ before contrib/ in make world 2011-08-24 21:36:53 +03:00
Makefile Allow make check in PL directories 2011-02-15 06:52:12 +02:00
README Remove useless whitespace at end of lines 2010-11-23 22:34:55 +02:00
README.git Trivial typo fix. 2010-09-21 14:16:00 -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:

	http://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.  Changes between all PostgreSQL releases are recorded in the
file HISTORY.  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
http://www.postgresql.org/download/.  For more information look at our
web site located at http://www.postgresql.org/.