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标题: 新版本MySQL 6.0.7-alpha发布了 [打印本页]

作者: kider 时间: 2008-10-24 09:23
标题: 新版本MySQL 6.0.7-alpha发布了
新版本MySQL 6.0.7-alpha发布详细内容参考：
http://www.mysql.com/mysql60/

此新版本中包含了两个新的存储引擎：the transactional Falcon engine, and the crash-safe Maria engine.

了其解详参考：
Falcon: http://www.mysql.com/why-mysql/white-papers/falcon-getting-started.php
Maria:  http://dev.mysql.com/doc/refman/6.0/en/se-maria.html

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MySQL 6.0.7-alpha, a new version of the MySQL database system has been released.
The main page for MySQL 6.0 release is at

  http://www.mysql.com/mysql60/

MySQL 6.0 includes two new storage engines: the transactional Falcon engine, and the crash-safe Maria engine.

If you are new to the Falcon storage engine and need more information, please read the Falcon Evaluation Guide at

  http://www.mysql.com/why-mysql/white-papers/falcon-getting-started.php

and the Falcon White Paper at

  http://www.mysql.com/why-mysql/white-papers/storage-engines-falcon.php

The Maria storage engine is a crash safe version of MyISAM.
Maria supports all of the main functionality of the MyISAM engine, but includes recovery support (in the event of a system crash), full logging (including CREATE, DROP, RENAME and TRUNCATE operations), all MyISAM row formats and a new Maria specific row format.
Maria is documented at

  http://dev.mysql.com/doc/refman/6.0/en/se-maria.html

MySQL 6.0.7-alpha is available in source and binary form for a number of platforms from our download pages at

  http://dev.mysql.com/downloads/mysql/6.0.html

and mirror sites.
Note that not all mirror sites may be up to date at this point in time, so if you can't find this version on some mirror, please try again later or choose another download site.

We welcome and appreciate your feedback, bug reports, bug fixes, and patches at

  http://forge.mysql.com/wiki/Contributing

The following section lists important, incompatible and security changes since the previous version of MySQL 6.0.
The full changelog, including many more fixes can be viewed online at

  http://dev.mysql.com/doc/refman/6.0/en/news-6-0-7.html

Important functionality added or changed:

* Important Change: mysqlbinlog now supports --verbose and

--base64-output=DECODE-ROWS options to display row events as

commented SQL statements.
(The default otherwise is to display

row events encoded as base-64 strings using BINLOG statements.)

See Section 4.6.7.2, "mysqlbinlog Row Event Display."

(Bug#31455: http://bugs.mysql.com/31455)

Important, security, or incompatible bugs fixed:

* Security Enhancement: The server consumed excess memory while

parsing statements with hundreds or thousands of nested

boolean conditions (such as OR (OR ... (OR ... ))).
This could

lead to a server crash or incorrect statement execution, or

cause other client statements to fail due to lack of memory.

The latter result constitutes a denial of service.

(Bug#38296: http://bugs.mysql.com/38296)

* Incompatible Change: There were some problems using DllMain()

hook functions on Windows that automatically do global and

per-thread initialization for libmysqld.dll:

+ Per-thread initialization: MySQL internally counts the

number of active threads, which causes a delay in

my_end() if not all threads have exited.
But there are

threads that can be started either by Windows internally

(often in TCP/IP scenarios) or by users.
Those threads do

not necessarily use libmysql.dll functionality but still

contribute to the open-thread count.
(One symptom is a

five-second delay in times for PHP scripts to finish.)

+ Process-initialization: my_init() calls WSAStartup that

itself loads DLLs and can lead to a deadlock in the

Windows loader.

To correct these problems, DLL initialization code now is not

invoked from libmysql.dll by default.

(Bug#37226: http://bugs.mysql.com/37226)

* Incompatible Change: Some performance problems of SHOW ENGINE

INNODB STATUS were reduced by removing used cells and Total

number of lock structs in row lock hash table from the output.

These values are now present only if UNIV_DEBUG is defined at

MySQL build time.

(Bug#36941: http://bugs.mysql.com/36941,

Bug#36942: http://bugs.mysql.com/36942)

* Important Change: The INFORMATION_SCHEMA.FALCON_TABLES table

has been removed.

(Bug#29211: http://bugs.mysql.com/29211,

Bug#34705: http://bugs.mysql.com/34705,

Bug#34706: http://bugs.mysql.com/34706)

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