【Vegas原创】在线修改redo.log文件的大小

2年前 (2022) 程序员胖胖胖虎阿

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1.查找日志文件的路径名和group#号

SQL> set linesize 50
SQL> select group#,member from v$logfile;

GROUP#
----------
MEMBER
--------------------------------------------------
3
/u02/app/oracle2/oradata/dtlberp/redo03.log

2
/u02/app/oracle2/oradata/dtlberp/redo02.log

1
/u02/app/oracle2/oradata/dtlberp/redo01.log

2.添加新的日志文件组

alter database add logfile group 4 '/u02/app/oracle2/oradata/dtlberp/redo04.log' size 100m;
alter database add logfile group 5 '/u02/app/oracle2/oradata/dtlberp/redo05.log' size 100m;
alter database add logfile group 6 '/u02/app/oracle2/oradata/dtlberp/redo06.log' size 100m;

3. 适时切日志，在INACTIVE状态下，删除group1，2，3组

select * from v$log;
alter system switch logfile;

alter database drop logfile group 1;
alter database drop logfile group 2;
alter database drop logfile group 3;

4，如果还想使用group1，2，3，则删除物理文件redo01.log，redo02.log和redo03.log,重复第2、3步骤即可。

alter database add logfile group 1 '/u02/app/oracle2/oradata/dtlberp/redo01.log' size 100m;
alter database add logfile group 2 '/u02/app/oracle2/oradata/dtlberp/redo02.log' size 100m;
alter database add logfile group 3 '/u02/app/oracle2/oradata/dtlberp/redo03.log' size 100m;

select * from v$log;
alter system switch logfile;

alter database drop logfile group 4;
alter database drop logfile group 5;
alter database drop logfile group 6;