看到一篇不错的文章 转载下
Nuno Souto (Noons) also asked a really interesting question on my Differences between Unique and Non-Unique Indexes blog entry (c[……]
看到一篇不错的文章 转载下
Nuno Souto (Noons) also asked a really interesting question on my Differences between Unique and Non-Unique Indexes blog entry (c[……]
测试环境:
[oracle@liu ~]$ sqlplus ‘/as sysdba’
SQL*Plus: Release 10.2.0.1.0 – Production on Mon Dec 26 21:53:23 2011
Copyright (c) 1982, 2005, Or[……]
总结下今天DG碰到的问题,本来一个很简单的问题,被我们复杂化衍生出很多问题。
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 – 64bit Production
With the Partit[……]
对于分支节点块(包括根节点块)来说,其所包含的索引条目都是按照顺序排列的(缺省是升序排列,也可以在创建索引时指定为降序排列)。每个索引条目(也可以叫做每条记录)都具有两个字段。第一个字段表示当前该分支节点块下面所链接的索引块中所包含的最小键值;第二个字段为四个字节,表示所[……]
16号早上10点左右发现系统变慢,查看等待事件 发现大量i/o salve wait, load 比值增加,等待语句sql_id为 38wm92jbxu0vf
09:59:30 up 80 days, 8:00, 2 users, load average: 16.02, 4.[……]
Limitations of DRIVING_SITE Hint
Applies to:
Oracle Server – Enterprise Edition – Version: 9.2.0.1 to 11.2.0.2
This problem can occur on a[……]
基于windows 2008平台升级rac 11.2.0.2.0->11.2.0.3.0
OS环境windows 2008 x64 数据库环境oracle 11g rac ,version 11.2.0.2.0 64bit
SQL> conn / as sysdba
已连接。
S[……]
11g Release 2 RMAN Backup Compression
Oracle 11g Release 2 introduced compression algorithm levels which can be used for compressing table data, Data[……]
今天新上线的系统物理备库出现以下错误:
[oracle@db-15 ~]$ sqlplus ‘/as sysdba’
SQL*Plus: Release 10.2.0.5.0 – Production on Fri Dec 16 20:37:38 2011
Copyright[……]