MySQL（發(fā)音：[?ma? ?s kju? ??l]，但也經(jīng)常讀作My- SEQuel）是一個開放源碼的關(guān)系數(shù)據(jù)庫管理系統(tǒng)，開發(fā)者為瑞典MySQL AB公司，現(xiàn)為Sun公司的一部分。2009年Oracle宣布收購Sun公司，因此MySQL可能成為Oracle旗下產(chǎn)品。MySQL由于性能高、成 本低、可靠性好，已經(jīng)成為最流行的開源數(shù)據(jù)庫，被廣泛地應(yīng)用在Internet上的中小型網(wǎng)站中。隨著MySQL的不斷成熟，它也逐漸用于更多大規(guī)模網(wǎng)站 和應(yīng)用，比如維基百科、Google和Facebook。非常流行的開源軟件組合LAMP中的M就是指 MySQL。

下載: MySQL 5.5.4 m4

mysql 在昨天發(fā)布了5.5 的第三個里程碑版后，今天又發(fā)布了第四個里程碑版。
主要是InnoDB方面的更新,目前只有for Linux on x86_64版本下載

Changes in MySQL 5.5.4:

InnoDB Plugin Notes:
?* This release includes InnoDB Plugin 1.1.

Bugs fixed:
?* The mysqld option to turn on support for large pages
? was erroneously linked to the internal variable that
? stores whether large file support is available. Turning
? large_pages on would show both support for large pages
? and for large files as available without actually turning
? on support for large pages. Turning large_pages off would
? show both as turned off without any actual implication to
? large file support, which is compiled in at build time.
? This bug was introduced in MySQL Server 5.5.3-m3.
? (Bug#52716: http://bugs.mysql.com/bug.php?id=52716 )

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