Oracle 11g 更改日志组大小

Oracle 11g 更改日志组大小

1、创建新的日志组

1.alter database add logfile group 4 (‘/u01/app/oracle/oradata/jian/redo04.log’) size 1024k;

2.alter database add logfile group 5 （‘/u01/app/oracle/oradata/jian/redo05.log’) size 1024k;

2、切换当前日志到新的日志组

1.alter system switch logfile;

2.alter system switch logfile;

3、删除旧的日志组

1.alter database drop logfile group 1;

2.alter database drop logfile group 2;

3.alter database drop logfile group 3;

4、操作系统下删除原日志组1、2、3中的文件

5、重建日志组1、2、3

1.alter database add logfile group 1 (’/u01/app/oracle/oradata/jian/redo01.log’) size 10M;

2.alter database add logfile group 2 (’/u01/app/oracle/oradata/jian/redo02.log’) size 10M;

3.alter database add logfile group 3 (’/u01/app/oracle/oradata/jian/redo03.log’) size 10M;

6、切换日志组

1.alter system switch logfile;

2.alter system switch logfile;

3.alter system switch logfile;

7、删除日志组4、5

1.alter database drop logfile group 4;

2.alter database drop logfile group 5;

8、到操作系统下删除原日志组4、5中的文件

9、备份当前的最新的控制文件

SQL> alter database backup controlfile to trace resetlogs

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