Commit Graph

104 Commits

Author SHA1 Message Date
Alvaro Herrera
da07a1e856 Background worker processes
Background workers are postmaster subprocesses that run arbitrary
user-specified code.  They can request shared memory access as well as
backend database connections; or they can just use plain libpq frontend
database connections.

Modules listed in shared_preload_libraries can register background
workers in their _PG_init() function; this is early enough that it's not
necessary to provide an extra GUC option, because the necessary extra
resources can be allocated early on.  Modules can install more than one
bgworker, if necessary.

Care is taken that these extra processes do not interfere with other
postmaster tasks: only one such process is started on each ServerLoop
iteration.  This means a large number of them could be waiting to be
started up and postmaster is still able to quickly service external
connection requests.  Also, shutdown sequence should not be impacted by
a worker process that's reasonably well behaved (i.e. promptly responds
to termination signals.)

The current implementation lets worker processes specify their start
time, i.e. at what point in the server startup process they are to be
started: right after postmaster start (in which case they mustn't ask
for shared memory access), when consistent state has been reached
(useful during recovery in a HOT standby server), or when recovery has
terminated (i.e. when normal backends are allowed).

In case of a bgworker crash, actions to take depend on registration
data: if shared memory was requested, then all other connections are
taken down (as well as other bgworkers), just like it were a regular
backend crashing.  The bgworker itself is restarted, too, within a
configurable timeframe (which can be configured to be never).

More features to add to this framework can be imagined without much
effort, and have been discussed, but this seems good enough as a useful
unit already.

An elementary sample module is supplied.

Author: Álvaro Herrera

This patch is loosely based on prior patches submitted by KaiGai Kohei,
and unsubmitted code by Simon Riggs.

Reviewed by: KaiGai Kohei, Markus Wanner, Andres Freund,
Heikki Linnakangas, Simon Riggs, Amit Kapila
2012-12-06 17:47:30 -03:00
Robert Haas
cee523867d pg_test_timing utility, to measure clock monotonicity and timing cost.
Ants Aasma, Greg Smith
2012-03-27 16:14:00 -04:00
Robert Haas
6e3323d41d Triggered change notifications.
Kevin Grittner, reviewed (in earlier versions) by Álvaro Herrera
2012-01-19 23:15:15 -05:00
Tom Lane
acb9198b96 Make distprep and *clean build targets recurse into all subdirectories.
Certain subdirectories do not get built if corresponding options are not
selected at configure time.  However, "make distprep" should visit such
directories anyway, so that constructing derived files to be included in
the tarball happens without requiring all configure options to be given
in the tarball build script.  Likewise, it's better if cleanup actions
unconditionally visit all directories (for example, this ensures proper
cleanup if someone has done a manual make in such a subdirectory).

To handle this, set up a convention that subdirectories that are
conditionally included in SUBDIRS should be added to ALWAYS_SUBDIRS
instead when they are excluded.

Back-patch to 9.1, so that plpython's spiexceptions.h will get provided
in 9.1 tarballs.  There don't appear to be any instances where distprep
actions got missed in previous releases, and anyway this fix requires
gmake 3.80 so we don't want to apply it before 9.1.
2011-07-03 13:55:12 -04:00
Tom Lane
7c5d0ae707 Add contrib/file_fdw foreign-data wrapper for reading files via COPY.
This is both very useful in its own right, and an important test case
for the core FDW support.

This commit includes a small refactoring of copy.c to expose its option
checking code as a separately callable function.  The original patch
submission duplicated hundreds of lines of that code, which seemed pretty
unmaintainable.

Shigeru Hanada, reviewed by Itagaki Takahiro and Tom Lane
2011-02-20 14:06:59 -05:00
Robert Haas
968bc6fac9 sepgsql, an SE-Linux integration for PostgreSQL
This is still pretty rough - among other things, the documentation
needs work, and the messages need a visit from the style police -
but this gets the basic framework in place.

KaiGai Kohei
2011-01-23 20:48:27 -05:00
Tom Lane
bc616703e8 Clean up pg_test_fsync commit.
Actually rename the program, rather than just claiming we did.  Hook it
into the build system.  Get rid of useless dependency on libpq.  Clean up
#include list and messy whitespace.
2011-01-21 19:27:25 -05:00
Robert Haas
fe7a32fc87 New contrib module, auth_delay.
KaiGai Kohei, with a few changes by me.
2010-11-27 07:22:25 -05:00
Peter Eisentraut
19e231bbda Improved parallel make support
Replace for loops in makefiles with proper dependencies.  Parallel
make can now span across directories.  Also, make -k and make -q work
properly.

GNU make 3.80 or newer is now required.
2010-11-12 22:15:16 +02:00
Robert Haas
4d355a8336 Add a SECURITY LABEL command.
This is intended as infrastructure to support integration with label-based
mandatory access control systems such as SE-Linux. Further changes (mostly
hooks) will be needed, but this is a big chunk of it.

KaiGai Kohei and Robert Haas
2010-09-27 20:55:27 -04:00
Magnus Hagander
9f2e211386 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
Simon Riggs
25fee5cfbd New contrib module for use as an archive_cleanup_command, or as a
standalone utility for removing files from archive.
2010-06-14 16:17:56 +00:00
Bruce Momjian
9885206cab Move pg_upgrade shared library out into its own /contrib directory
(pg_upgrade_support).
2010-05-13 01:03:01 +00:00
Tom Lane
44e55690fd Hook pg_upgrade into the contrib makefile structure so it gets built
on the buildfarm.
2010-05-12 16:50:58 +00:00
Tom Lane
c742b795dd Add a hook to CREATE/ALTER ROLE to allow an external module to check the
strength of database passwords, and create a sample implementation of
such a hook as a new contrib module "passwordcheck".

Laurenz Albe, reviewed by Takahiro Itagaki
2009-11-18 21:57:56 +00:00
Teodor Sigaev
92e05bc6a5 Unaccent dictionary. 2009-08-18 10:34:39 +00:00
Peter Eisentraut
7798147a76 Expand test coverage support to entire tree
Test coverage support now covers the entire source tree, including
contrib, instead of just src/backend.  In a related but independent
development, the commands make coverage and make coverage-html can be run
in any directory.

This turned out to be much easier than feared.  Besides a few ad hoc fixes
to pass the make target down the tree, change all affected makefiles to
list their directories in the SUBDIRS variable, changed from variants like
DIRS and WANTED_DIRS.  MSVC build fix was attempted as well.
2009-08-07 20:50:22 +00:00
Tom Lane
9151e1bb06 Add btree_gin contrib module.
Teodor Sigaev and Oleg Bartunov
2009-03-25 23:20:01 +00:00
Tom Lane
7466eeac61 Add contrib/pg_stat_statements for server-wide tracking of statement execution
statistics.

Takahiro Itagaki
2009-01-04 22:19:59 +00:00
Tom Lane
e125e28e78 Add auto-explain contrib module for automatic logging of the plans of
slow-running queries.

Takahiro Itagaki
2008-11-19 02:59:28 +00:00
Tom Lane
ab9907f5e5 Add a new, improved version of citext as a contrib module.
David E. Wheeler
2008-07-29 18:31:20 +00:00
Tom Lane
eb915caf92 Fix contrib/xml2 makefile to not override CFLAGS, and in passing make it
auto-configure properly for libxslt present or not.
2008-05-08 16:49:37 +00:00
Tom Lane
f85252097f Re-add contrib/tsearch2 to the set of buildable contrib modules. 2007-11-13 21:04:45 +00:00
Tom Lane
5fcb079858 Add sample text search dictionary templates and parsers, to replace the
hard-to-maintain textual examples currently in the SGML docs.  From
Sergey Karpov.
2007-10-15 21:36:50 +00:00
Tom Lane
17333b6d09 Remove contrib/txid, in preparation for migrating it into core. 2007-10-13 22:59:43 +00:00
Jan Wieck
1f92630fc4 Added the Skytools extended transaction ID module to contrib as discussed
on CORE previously.

This module offers transaction ID's containing the original XID and the
transaction epoch as a bigint value to the user level. It also provides
a special txid_snapshot data type that contains an entire transactions
visibility snapshot information, which is useful to determine if a
particular txid was visible to a transaction or not.

The module has been tested by porting Slony-I from using its original
xxid data type.

Jan
2007-10-07 23:32:19 +00:00
Tom Lane
46dedde524 contrib/tsearch2 now fails its regression test because of conflicts with
the core additions.  For the moment I diked it out of contrib/Makefile.
We should look at turning it into a backward-compatibility package.
2007-08-21 01:12:28 +00:00
Tom Lane
bd0a260928 Make CREATE/DROP/RENAME DATABASE wait a little bit to see if other backends
will exit before failing because of conflicting DB usage.  Per discussion,
this seems a good idea to help mask the fact that backend exit takes nonzero
time.  Remove a couple of thereby-obsoleted sleeps in contrib and PL
regression test sequences.
2007-06-01 19:38:07 +00:00
Bruce Momjian
64058429c5 Add database page inspection /contrib module.
Simon and Heikki
2007-05-17 19:11:25 +00:00
Peter Eisentraut
74496bc298 Contrib module uuid-ossp for generating UUID values using the OSSP UUID
library.  New configure option --with-ossp-uuid to activate.
2007-04-21 17:26:18 +00:00
Andrew Dunstan
f97d4a267a Add --with-libxslt configure option 2007-04-15 12:48:24 +00:00
Andrew Dunstan
1656cb76f7 revert change to build xml2 until a better fix is found 2007-04-14 12:57:07 +00:00
Andrew Dunstan
6506a584cc Enable building contrib/xml2 if configured using --with-libxml.
If this breaks things due to missing libxslt, then I'll have to
revert it, but let's see if it breaks the buildfarm.

Workarounds in case libxslt is missing include:
. don't configure with libxml, or
. don't build contrib modules from the contrib Makefile (use the individual module Makefiles instead), or
. change the xml2 Makefile
2007-04-13 18:50:01 +00:00
Bruce Momjian
528779a2c6 Add /contrib/pg_standby:
pg_standby is a production-ready program that can be used to
  create a Warm Standby server. Other configuration is required
  as well, all of which is described in the main server manual.

Simon Riggs
2007-02-08 15:09:47 +00:00
Tom Lane
dff84dc762 Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and
remove the old isbn_issn module which is about to be obsoleted by EAN13.
contrib/isn is by Germán Méndez Bravo.  Our thanks to Garrett A. Wollman
for having written the original isbn_issn module.
2006-09-09 04:07:52 +00:00
Teodor Sigaev
642194ba0c Add hstore contrib module.
Per discussion
http://archives.postgresql.org/pgsql-hackers/2006-08/msg01409.php
2006-09-05 18:00:58 +00:00
Tom Lane
af7d257e21 Remove contrib modules that have been migrated to pgfoundry: adddepend,
dbase, dbmirror, fulltextindex, mac, userlock; or abandoned: mSQL-interface,
tips.
2006-09-05 17:20:29 +00:00
Peter Eisentraut
6dc920de59 sslinfo contrib module - information about current SSL certificate
Author: Victor Wagner <vitus@cryptocom.ru>
2006-09-04 15:07:46 +00:00
Bruce Momjian
85f6e27d9b Add /contrib/adminpack to contrib/Makefile, do case-folding change. 2006-05-30 13:25:57 +00:00
Tatsuo Ishii
4799cd7f24 Add pgrowlocks 2006-04-23 02:17:59 +00:00
Peter Eisentraut
c8c864c261 Put flex'ed and bison'ed files in contrib in the distribution tarball, as
is done for the analogous files in the main distribution.
2006-04-03 18:47:41 +00:00
Peter Eisentraut
e6917b1255 Remove ora2pg; now available at <http://www.samse.fr/GPL/ora2pg/>. 2006-02-25 19:18:58 +00:00
Bruce Momjian
d5dd3d451e Add contrib/pg_freespacemap to display free space map information.
Mark Kirkwood
2006-02-12 03:55:53 +00:00
Tom Lane
ce128c01a6 Correct comment about why contrib/xml2 isn't built automatically. 2005-09-01 22:02:44 +00:00
Tom Lane
80f6c35833 Remove contrib version of pg_autovacuum --- superseded by integrated
version.
2005-07-29 19:38:22 +00:00
Bruce Momjian
85e9a5a014 Move reindexdb from /contrib to /bin.
Euler Taveira de Oliveira
2005-07-29 15:13:11 +00:00
Bruce Momjian
358a897fa1 Move dbsize functions into the backend. New functions:
pg_tablespace_size
	pg_database_size
	pg_relation_size
	pg_complete_relation_size
	pg_size_pretty

Remove /contrib/dbsize.

Dave Page
2005-07-29 14:47:04 +00:00
Tom Lane
e6a8eba3f2 Remove contrib version of rtree_gist --- now in core system. 2005-07-01 19:23:07 +00:00
Tom Lane
2f5c47e882 Move findoidjoins out of contrib and into src/tools, which is a more
logical place for it since it is of no use to users.  Per recent
discussions on cleaning up contrib.
2005-06-23 02:33:28 +00:00
Tom Lane
d20763dbee Remove contrib modules that have been agreed to be obsolete.
(There are more that will be removed once they've been copied to
pgfoundry.org.)
2005-06-22 22:56:29 +00:00