PostgreSQL (32-bit)

最新版本 PostgreSQL 9.4.4 (32-bit)

PostgreSQL 9.4.4 (32-bit)

PostgreSQL 9.4.4 (32-bit)
PostgreSQL 是一個功能強大的開源對象關係數據庫系統。它擁有超過 15 年的積極開發和經過驗證的架構,在可靠性,數據完整性和正確性方面贏得了良好聲譽。它運行在所有主要操作系統上,包括 Linux,UNIX(AIX,BSD,HP-UX,SGI IRIX,Mac OS X,Solaris,Tru64)和 Windows。PostgreSQL 是一個功能強大的對象關係數據庫管理系統!

它完全兼容 ACID,完全支持外鍵,連接,視圖,觸發器和存儲過程(使用多種語言)。它包括大多數 SQL:2008 數據類型,包括 INTEGER,NUMERIC,BOOLEAN,CHAR,VARCHAR,DATE,INTERVAL 和 TIMESTAMP。它還支持存儲二進制大對象,包括圖片,聲音或視頻。它具有用於 C / C ++,Java,.Net,Perl,Python,Ruby,Tcl,ODBC 等的本地編程接口,以及特殊的文檔(表格大小可以達到 32TB).

也可用:下載 PostgreSQL for Mac



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軟體資訊
檔案版本 PostgreSQL 9.4.4 (32-bit)

檔案名稱 postgresql-9.4.4-1-windows.exe
檔案大小 55.92 MB
系統 Windows XP / Vista / Windows 7 / Windows 8 / Windows 10
軟體類型 開源軟體
作者 PostgreSQL Global Development Group
官網 http://www.postgresql.org/about/
更新日期 2015-06-13
更新日誌

What's new in this version:

Changes:
Fix possible failure to recover from an inconsistent database state:
- Recent PostgreSQL releases introduced mechanisms to protect against multixact wraparound, but some of that code did not account for the possibility that it would need to run during crash recovery, when the database may not be in a consistent state. This could result in failure to restart after a crash, or failure to start up a secondary server. The lingering effects of a previously-fixed bug in pg_upgrade could also cause such a failure, in installations that had used pg_upgrade versions between 9.3.0 and 9.3.4.
- The pg_upgrade bug in question was that it would set oldestMultiXid to 1 in pg_control even if the true value should be higher. With the fixes introduced in this release, such a situation will result in immediate emergency autovacuuming until a correct oldestMultiXid value can be determined. If that would pose a hardship, users can avoid it by doing manual vacuuming before upgrading to this release.

In detail:
- Check whether pg_controldata reports "Latest checkpoint's oldestMultiXid" to be 1. If not, there's nothing to do.
- Look in PGDATA/pg_multixact/offsets to see if there's a file named 0000. If there is, there's nothing to do.
- Otherwise, for each table that has pg_class.relminmxid equal to 1, VACUUM that table with both vacuum_multixact_freeze_min_age and vacuum_multixact_freeze_table_age set to zero. (You can use the vacuum cost delay parameters described in Section 18.4.4 to reduce the performance consequences for concurrent sessions.)

Fix rare failure to invalidate relation cache init file:
- With just the wrong timing of concurrent activity, a VACUUM FULL on a system catalog might fail to update the "init file" that's used to avoid cache-loading work for new sessions. This would result in later sessions being unable to access that catalog at all. This is a very ancient bug, but it's so hard to trigger that no reproducible case had been seen until recently.

Avoid deadlock between incoming sessions and CREATE/DROP DATABASE:
- A new session starting in a database that is the target of a DROP DATABASE command, or is the template for a CREATE DATABASE command, could cause the command to wait for five seconds and then fail, even if the new session would have exited before that.

Improve planner's cost estimates for semi-joins and anti-joins with inner indexscans:
- This type of plan is quite cheap when all the join clauses are used as index scan conditions, even if the inner scan would nominally fetch many rows, because the executor will stop after obtaining one row. The planner only partially accounted for that effect, and would therefore overestimate the cost, leading it to possibly choose some other much less efficient plan type.

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