今天一个朋友问我在Oracle10g中如何删除归档日志,就这个问题作如下回答:Oracle中归档日志不能通过操作系统(OS)级命令直接删除
今天一个朋友问我在Oracle10g中如何删除归档日志,就这个问题作如下回答:
Oracle中归档日志不能通过操作系统(OS)级命令直接删除,因为归档日志的一些信息在控制文件中是有记录的,而且如果使用OS级命令直接删除以后,控制文件中的信息是不会改变的,还有,就是相关系统视图中的信息也不会发生改变。Oracle系统仍然会认为归档日志是存在的。
那怎么正确的删除归档日志呢?
可以使用下面的几种方法:
可以使用RMAN来删除archivelog,具体可以按以下步骤操作:
1、使用OS级命令物理删除archivelog
2、进入RMAN
3、crosscheck archivelog all;
4、delete expried archivelog all;
这样就在一些Oracle的记录中查不到相应的archivelog记录了。
二、直接使用RMAN删除archivelog
其实在RMAN中是可以使用命令直接将ARCHIVELOG删除的,命令如下:
RMAN>DELETE ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-7';
表示删除7天以前的所有archivelog,但是这个命令的缺点是无法对archivelog进行细致的划分。
三、使用RMAN备份aechivelog后删除
这是一种最为稳妥的方法了,,使用RMAN备份archivelog,备份后全部删除
backup format '/u01/arch_%T_%s_%U' archivelog all delete input;
或者
backup database plus archivelog;

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