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An enterprise class database, PostgreSQL boasts sophisticated features such as Multi-Version Concurrency Control (MVCC), point in time recovery, tablespaces, asynchronous replication, nested transactions (savepoints), online/hot backups, a sophisticated query planner/optimizer, and write ahead logging for fault tolerance. It supports international character sets, multibyte character encodings, Unicode, and it is locale-aware for sorting, case-sensitivity, and formatting. It is highly scalable both in the sheer quantity of data it can manage and in the number of concurrent users it can accommodate. There are active PostgreSQL systems in production environments that manage in excess of 4 terabytes of data.

You can download file releases of PostgreSQL project from List of release files

List of release files

File/Folder Name	File Type	Size	Date	Download Count
Latest 5 files
postgresql-9.2.4-1-linux.run	application/x-executable; charset=binary	34.3 MB	2013-04-04 21:27	14
postgresql-9.2.4-1-linux-x64.run	application/x-executable; charset=binary	35.7 MB	2013-04-04 21:23	13
postgresql-9.2.4-1-osx.dmg	application/octet-stream; charset=binary	54.7 MB	2013-04-04 21:20	3
postgresql-9.2.4-1-windows-x64.exe	application/octet-stream; charset=binary	22.1 MB	2013-04-04 21:16	19
postgresql-9.2.4-1-windows.exe	application/octet-stream; charset=binary	50.8 MB	2013-04-04 21:13	19
All Files
PostgreSQL 9.2.4
postgresql-9.2.4-1-linux.run	application/x-executable; charset=binary	34.3 MB	2013-04-04 21:27	14
postgresql-9.2.4-1-linux-x64.run	application/x-executable; charset=binary	35.7 MB	2013-04-04 21:23	13
postgresql-9.2.4-1-osx.dmg	application/octet-stream; charset=binary	54.7 MB	2013-04-04 21:20	3
postgresql-9.2.4-1-windows-x64.exe	application/octet-stream; charset=binary	22.1 MB	2013-04-04 21:16	19
postgresql-9.2.4-1-windows.exe	application/octet-stream; charset=binary	50.8 MB	2013-04-04 21:13	19
postgresql-9.2.4.tar.gz	application/x-gzip; charset=binary	21.0 MB	2013-04-04 21:07	6
PostgreSQL 9.2.3
postgresql-9.2.3.tar.gz	application/x-gzip; charset=binary	21.0 MB	2013-02-07 20:43	112
postgresql-9.2.3-1-windows.exe	application/octet-stream; charset=binary	50.8 MB	2013-02-07 20:42	95
postgresql-9.2.3-1-windows-x64.exe	application/octet-stream; charset=binary	52.2 MB	2013-02-07 20:39	82
postgresql-9.2.3-1-osx.dmg	application/octet-stream; charset=binary	53.0 MB	2013-02-07 20:37	12
postgresql-9.2.3-1-linux.run	application/x-executable; charset=binary	34.3 MB	2013-02-07 20:34	29
postgresql-9.2.3-1-linux-x64.run	application/x-executable; charset=binary	35.7 MB	2013-02-07 20:33	18
PostgreSQL 9.2.2
postgresql-9.2.2-1-windows.exe	application/octet-stream; charset=binary	50.6 MB	2012-12-10 19:36	206
postgresql-9.2.2-1-osx.dmg	application/octet-stream; charset=binary	52.7 MB	2012-12-10 19:33	17
postgresql-9.2.2-1-linux.run	application/x-executable; charset=binary	34.3 MB	2012-12-10 19:30	57
postgresql-9.2.2-1-linux-x64.run	application/x-executable; charset=binary	35.7 MB	2012-12-10 19:28	68
PostgreSQL 9.2.1
postgresql-9.2.1-1-windows.exe	application/octet-stream; charset=binary	49.6 MB	2012-09-24 17:41	272
postgresql-9.2.1-1-windows-x64.exe	application/octet-stream; charset=binary	51.2 MB	2012-09-24 17:38	204
postgresql-9.2.1-1-osx.dmg	application/octet-stream; charset=binary	52.7 MB	2012-09-24 17:36	20
postgresql-9.2.1-1-linux.run	application/x-executable; charset=binary	34.1 MB	2012-09-24 17:33	68
postgresql-9.2.1-1-linux-x64.run	application/x-executable; charset=binary	35.5 MB	2012-09-24 17:32	122
postgresql-9.2.1.tar.gz	application/x-gzip; charset=binary	20.6 MB	2012-09-24 17:30	329
PostgreSQL 9.2.0
postgresql-9.2.0-1-windows.exe	application/octet-stream; charset=binary	49.6 MB	2012-09-12 18:01	57
postgresql-9.2.0-1-windows-x64.exe	application/octet-stream; charset=binary	51.2 MB	2012-09-12 17:58	59
postgresql-9.2.0-1-osx.dmg	application/octet-stream; charset=binary	52.7 MB	2012-09-12 17:56	20
postgresql-9.2.0-1-linux.run	application/x-executable; charset=binary	34.1 MB	2012-09-12 17:52	25
postgresql-9.2.0-1-linux-x64.run	application/x-executable; charset=binary	35.5 MB	2012-09-12 17:50	44
postgresql-9.2.0.tar.bz2	application/x-bzip2; charset=binary	15.7 MB	2012-09-12 17:48	17
PostgreSQL 9.1.5
postgresql-9.1.5-1-windows.exe	application/octet-stream; charset=binary	47.4 MB	2012-08-20 19:32	134
postgresql-9.1.5-1-windows-x64.exe	application/octet-stream; charset=binary	49.1 MB	2012-08-20 19:30	62
postgresql-9.1.5-1-osx.dmg	application/octet-stream; charset=binary	59.5 MB	2012-08-20 19:27	19
postgresql-9.1.5-1-linux.run	application/x-executable; charset=binary	43.5 MB	2012-08-20 19:24	16
postgresql-9.1.5-1-linux-x64.run	application/x-executable; charset=binary	45.0 MB	2012-08-20 19:21	28
postgresql-9.1.5.tar.bz2	application/x-bzip2; charset=binary	15.2 MB	2012-08-17 16:32	20
PostgreSQL 9.1.4
postgresql-9.1.4-1-windows.exe	application/octet-stream; charset=binary	47.4 MB	2012-06-04 18:04	332
postgresql-9.1.4-1-windows-x64.exe	application/octet-stream; charset=binary	50.0 MB	2012-06-04 18:02	127
postgresql-9.1.4-1-osx.dmg	application/octet-stream; charset=binary	58.9 MB	2012-06-04 17:59	32
postgresql-9.1.4-1-linux.run	application/x-executable; charset=binary	43.0 MB	2012-06-04 17:57	73
postgresql-9.1.4-1-linux-x64.run	application/x-executable; charset=binary	44.3 MB	2012-06-04 17:54	132
postgresql-9.1.4.tar.gz	application/x-gzip; charset=binary	20.0 MB	2012-06-04 17:52	166
postgresql-9.1.3-1-windows.exe	application/octet-stream; charset=binary	47.3 MB	2012-02-27 21:25	565
postgresql-9.1.3-1-windows-x64.exe	application/octet-stream; charset=binary	49.9 MB	2012-02-27 21:23	261
postgresql-9.1.3-1-osx.dmg	application/octet-stream; charset=binary	53.7 MB	2012-02-27 21:19	48
postgresql-9.1.3-1-linux.run	application/x-executable; charset=binary	42.9 MB	2012-02-27 21:16	106
postgresql-9.1.3-1-linux-x64.run	application/x-executable; charset=binary	44.2 MB	2012-02-27 21:13	65
postgresql-9.1.3.tar.bz2	application/x-bzip2; charset=binary	15.2 MB	2012-02-27 21:10	35
postgresql-9.1.2-1-windows.exe	application/octet-stream; charset=binary	47.0 MB	2011-12-29 03:23	513
postgresql-9.1.2-1-osx.dmg	application/octet-stream; charset=binary	53.7 MB	2011-12-29 03:21	18
postgresql-9.1.2-1-linux.run	application/x-executable; charset=binary	42.5 MB	2011-12-29 03:18	104
postgres_9.1.2-1.i386.openscg.deb	application/octet-stream; charset=binary	14.4 MB	2011-12-29 03:16	13
postgresql-9.1.2.tar.gz	application/x-gzip; charset=binary	19.6 MB	2011-12-19 21:29	151