Oracle配置多路复用在线日志组的方法

目的：添加多路复用在线日志组

1.添加成员至4号在线日志组
alter database add logfile member '/arp/oraarp/oradata/arpdb/redo041.log' to group 4;

2.查看在线日志组日志位置
column MEMBER format a20;
set linesize 200;
SQL> select group#,MEMBER,TYPE,STATUS from v$logfile;
    GROUP# MEMBER               TYPE           STATUS
---------- -------------------- -------------- --------------
         4 /arp/oraarp/oradata/ ONLINE
           arpdb/redo041.log
         4 /arp/oraarp/oradata/ ONLINE
           arpdb/redo04.log
         5 /arp/oraarp/oradata/ ONLINE
           arpdb/redo05.log
         6 /arp/oraarp/oradata/ ONLINE
           arpdb/redo06.log

3.查看当前日志组的状态
SQL> select group#,members,bytes/1024/1024,status from v$log;
    GROUP#    MEMBERS BYTES/1024/1024 STATUS
---------- ---------- --------------- --------------------------------
         4          2             512 INACTIVE
         5          1             512 CURRENT
         6          1             512 INACTIVE
 
4.删除一个非活动的重做日志组的成员
SQL> alter database drop logfile member '/arp/oraarp/oradata/arpdb/redo041.log';