Articles from October 2009



Multiplexing Oracle Control File

1 Multiplexing the control file when using SPFILE
Firstly, Obtain the information of your control file
SQL> select * from v$controlfile;

STATUS
NAME
IS_
BLOCK_SIZE
FILE_SIZE_BLKS

/u01/oradata/helen/control01.ctl
NO
16384
430

/u01/oradata/helen/control02.ctl
NO
16384
430

also you can issue this command show parameter control_files to get the information of your control file.
Secondly, Make sure that your server is using [...]

Who you cared about ?

Who you cared about ?

The Google Chrome shortcut

How to use Google Chrome ?

Introduce the Oracle Control File

Control File
The control file is a small binary file necessary for the database to start and operate successfully. Each control file is associated with only one Oracle database. Before a database is opened, the control file is read to determine whether the database is in a valid state to use.
A control file is updated continuously by the [...]

感情就像开车

感情就像开车,什么车和什么乘客都是搭配着来的。你的车要去“幸福”的,人家想去“财富”,自然就不会搭你的车。也有的人想去“幸福”的,但觉得你还要去“奋斗”绕一圈太远,就自己打的走了。或者愿意跟着你的车绕一圈,但是发现你这车不好看,又没空调,就会再等一辆。你到了站台,别看到有那么多人就一定要停,上面可能根本没有属于你的乘客,没人上车你就果断地往前开,前面的站台会有人等,别浪费时间。如果你非要等非要拉上来一个,半路也会下去换车。而你现在就是这么一辆车,一辆外表普通的小巴,但是里面有最好的设施,有温度最适宜的空调,但这些你都不要告诉别人,只有想坐这辆车的人才会上来然后发现,如果有些人因为这些设施上来,最后也只能因为目的地不同而无奈下车。你这辆车会先到“奋斗”,然后“成功”,再到“财富”和“幸福”。告诉站台上的所有人,如果不想去“奋斗”的,不要上车,自己找直达的车,因为你要在那边停很久。
感情就像开车,什么车和什么乘客都是搭配着来的。你的车要去“幸福”的,人家想去“财富”,自然就不会搭你的车。也有的人想去“幸福”的,但觉得你还要去“奋斗”绕一圈太远,就自己打的走了。或者愿意跟着你的车绕一圈,但是发现你这车不好看,又没空调,就会再等一辆。

How to backup the Oracle Control File?

Backup the Oracle Control File

user_tab_modifications

USER_TAB_MODIFICATIONS describes modifications to all tables owned by the
current user that have been modified since the last time statistics were gathered on the
USER_TAB_MODIFICATIONS describes modifications to all tables owned by the current user that have been modified since the last time statistics were gathered on the tables.
使用User_tab_modifications来获取数据表的DML过程:
1,SQL> select * from USER_TAB_MODIFICATIONS ;
no rows selected
2,  SQL>insert into test values(1,’Asher’);
one [...]