Big Head DBA 的评论 http://www.bigheaddba.net 幸福在远方，我在路上...... Fri, 30 Jul 2010 09:21:37 +0000 http://wordpress.org/?v=2.7.1 hourly 1 gary 对《Mysql管理必备工具Maatkit详解之一（安装Maatkit）》的评论 http://www.bigheaddba.net/article/y2009/159_mysql%e7%ae%a1%e7%90%86%e5%bf%85%e5%a4%87%e5%b7%a5%e5%85%b7maatkit%e8%af%a6%e8%a7%a3%e4%b8%80%ef%bc%88%e5%ae%89%e8%a3%85maatkit%ef%bc%89.html/comment-page-1#comment-1000 gary Mon, 05 Jul 2010 12:10:59 +0000 http://www.bigheaddba.net/?p=159#comment-1000 data-showtable,msql-mysql-modules ,我没有安装,不知道这2个和maatkit有什么联系? DBD我安装的是rpm包perl-DBD-mysql-4.011-1.el4.rf.x86_64.rpm. DBD的编译安装太复杂. data-showtable,msql-mysql-modules ,我没有安装,不知道这2个和maatkit有什么联系?
DBD我安装的是rpm包perl-DBD-mysql-4.011-1.el4.rf.x86_64.rpm. DBD的编译安装太复杂.

]]> Gary – If you want something, you first need to give. » mysql maatkit(formely mysql toolkit) 心得 对《Mysql管理必备工具Maatkit详解之一（安装Maatkit）》的评论 http://www.bigheaddba.net/article/y2009/159_mysql%e7%ae%a1%e7%90%86%e5%bf%85%e5%a4%87%e5%b7%a5%e5%85%b7maatkit%e8%af%a6%e8%a7%a3%e4%b8%80%ef%bc%88%e5%ae%89%e8%a3%85maatkit%ef%bc%89.html/comment-page-1#comment-998 Gary – If you want something, you first need to give. » mysql maatkit(formely mysql toolkit) 心得 Mon, 05 Jul 2010 07:20:47 +0000 http://www.bigheaddba.net/?p=159#comment-998 [...] http://www.bigheaddba.net/article/y2009/159_mysql管理必备工具maatkit详解一（安装maatkit [...] http://www.bigheaddba.net/article/y2009/159_mysql管理必备工具maatkit详解一（安装maatkit

]]> gary 对《Mysql管理必备工具Maatkit详解之十二(mk-query-digest)》的评论 http://www.bigheaddba.net/article/y2009/415_mysql%e7%ae%a1%e7%90%86%e5%bf%85%e5%a4%87%e5%b7%a5%e5%85%b7maatkit%e8%af%a6%e8%a7%a3%e4%b9%8b%e5%8d%81%e4%ba%8cmk-query-digest.html/comment-page-1#comment-997 gary Mon, 05 Jul 2010 07:16:44 +0000 http://www.bigheaddba.net/?p=415#comment-997 是不能搜. chcome,ie都测试了,不能. 是不能搜.
chcome,ie都测试了,不能.

]]> gary 对《Mysql管理必备工具Maatkit详解之一（安装Maatkit）》的评论 http://www.bigheaddba.net/article/y2009/159_mysql%e7%ae%a1%e7%90%86%e5%bf%85%e5%a4%87%e5%b7%a5%e5%85%b7maatkit%e8%af%a6%e8%a7%a3%e4%b8%80%ef%bc%88%e5%ae%89%e8%a3%85maatkit%ef%bc%89.html/comment-page-1#comment-996 gary Mon, 05 Jul 2010 07:12:18 +0000 http://www.bigheaddba.net/?p=159#comment-996 谢谢. 收藏半年了,开始学这个东东了. 谢谢.
收藏半年了,开始学这个东东了.

]]> gary 对《简单对比Mysql的AUTO_INCREMENT和Oracle的SEQUENCE》的评论 http://www.bigheaddba.net/article/y2010/559_%e7%ae%80%e5%8d%95%e5%af%b9%e6%af%94mysql%e7%9a%84auto_increment%e5%92%8coracle%e7%9a%84sequence.html/comment-page-1#comment-995 gary Mon, 05 Jul 2010 07:06:28 +0000 http://www.bigheaddba.net/?p=559#comment-995 粗看下,oracle sequence比mysql table内的auto incremental列强. 据文档,Mysql Innodb 可能出现性能问题. When accessing the auto-increment counter, InnoDB uses a special table-level AUTO-INC lock that it keeps to the end of the current SQL statement, not to the end of the transaction. The special lock release strategy was introduced to improve concurrency for inserts into a table containing an AUTO_INCREMENT column. Nevertheless, two transactions cannot have the AUTO-INC lock on the same table simultaneously, which can have a performance impact if the AUTO-INC lock is held for a long time. That might be the case for a statement such as INSERT INTO t1 ... SELECT ... FROM t2 that inserts all rows from one table into another. 粗看下,oracle sequence比mysql table内的auto incremental列强.
据文档,Mysql Innodb 可能出现性能问题.
When accessing the auto-increment counter, InnoDB uses a special table-level AUTO-INC lock that it keeps to the end of the current SQL statement, not to the end of the transaction. The special lock release strategy was introduced to improve concurrency for inserts into a table containing an AUTO_INCREMENT column. Nevertheless, two transactions cannot have the AUTO-INC lock on the same table simultaneously, which can have a performance impact if the AUTO-INC lock is held for a long time. That might be the case for a statement such as INSERT INTO t1 … SELECT … FROM t2 that inserts all rows from one table into another.

]]>