Oracle RAC下调节redo log file 文件大小

Oracle RAC下调节redo log file 文件大小。

(1)查看当前日志信息:


select * from v$logfile;


(步骤2中得路径可以在这里MEMBER列看到,redo文件名自己命名,比如,redo07.log)

(注意:日志组现在是6组)

(2)为各个节点添加日志文件:(每个节点添加三组日志)
1.节点1
ALTER DATABASE ADD LOGFILE THREAD 1 group 7 ‘+data/....(单引号里面是路径)′ size 2048m;
ALTER DATABASE ADD LOGFILE THREAD 1 group 8 ‘+data/....(单引号里面是路径)′ size 2048;
ALTER DATABASE ADD LOGFILE THREAD 1 group 9 ‘+data/....(单引号里面是路径)′ size 2048;

2.节点2
ALTER DATABASE ADD LOGFILE THREAD 2 group 10 ‘+data/....(单引号里面是路径)′ size 2048m;
ALTER DATABASE ADD LOGFILE THREAD 2 group 11 ‘+data/....(单引号里面是路径)′ size 2048m;
ALTER DATABASE ADD LOGFILE THREAD 2 group 12 ‘+data/....(单引号里面是路径)′ size 2048m;

(3)手动切换日志并删除之前日志:(此步骤反复执行,一直到把group 1,2,3,4,5,6全部删除)

查看日志文件状态列(STATUS):

SELECT * FROM V$LOG;

只有STATUS列为inactive状态才能被删除:
alter database drop logfile group 1;
alter database drop logfile group 2;
alter database drop logfile group 3;
alter database drop logfile group 4;
alter database drop logfile group 5;
alter database drop logfile group 6;

alter system switch logfile;(切换日志可改变status列的状态,再进行删除)

如果不能改变状态使用这个:alter system archive log current;

最后再:删除之前的redo log file(操作系统层面删除)

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