oracle 日志基本操作说明

我不是女神ヾ 2022-09-17 11:20 191阅读 0赞

1.查询系统使用的是哪一组日志文件：  
select \* from v$log;

2.查询正在使用的组所对应的日志文件：  
select \* from v$logfile;

3.强制日志切换：  
alter system switch logfile;

4.查询历史日志：  
select \* from v$log\_history;

5.查询日志的归档模式：  
select dbid,name,created,log\_mode from v$database;

6.查询归档日志的信息：  
select recid,stamp,thread\#,sequence\#,name from v$archived\_log;

7.增加与删除日志文件组  
alter database add logfile group 1 ('/home1/[Oracle][]/oradata/ora8i/log1a.log'),'/home2/oracle/oradata/ora8i/log1b.log') size 100M;

alter database drop logfile group 1;

8.增加与删除日志成员  
alter database add logfile member '/home1/oracle/oradata/ora8i/log1a.log' to group 1,'/home1/oracle/oradata/ora8i/log2a.log' to group 2;

alter database drop logfile member '/home1/oracle/oradata/ora8i/log1a.log' ;

9.日志文件移动  
alter database rename file '/home1/oracle/oradata/ora8i/log1a.log' to '/home2/oracle/oradata/ora8i/log1a.log';  
执行该命令之前必须保证该日志文件物理上已经移动到新目录

10.清除日志文件  
alter database clear logfile '/home1/oracle/oradata/ora8i/log1a.log';  
该命令用于不能用删除组及组成员命令删除日志时使用

8.查看归档日志占用空间：  
SELECT space\_limit/1024/1024/1024 AS "Quota\_G",space\_used/1024/1024 AS "Used\_M",space\_used/space\_limit\*100 "Used\_%",space\_reclaimable AS reclaimable,number\_of\_files AS files FROM v$recovery\_file\_dest ;

9.修改归档日志空间大小  
alter system set DB\_RECOVERY\_FILE\_DEST\_SIZE=40g;

10.查看归档日志列表  
RMAN> list archivelog all;  
删除归档日志  
RMAN> delete archivelog until time 'sysdate-1' ;  
双机下也可以用  
delete obsolete;  
crosscheck archivelog all;  
delete expired archivelog all;

11. 用list expired看看是否有失效的archive log,证明没有失效的archive log:  
RMAN> list expired archivelog all;

[Oracle]: http://www.linuxidc.com/topicnews.aspx?tid=12