11 1 0 400 YES UNUSED 0
12 2 0 400 YES UNUSED 0
4.delete原来50M 状态为INACTIVE的redo log 若原来的redo log状态为非INACTIVE，则多做几次全局检查点和切换redo log 即可
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；
5.查看当前最新redo log
SQL> select group#,thread#,SEQUENCE# ,BYTES/1024/1024 "MB", ARCHIVED,STATUS,FIRST_CHANGE# ,FIRST_TIME FROM V$LOG;
GROUP# THREAD# SEQUENCE# MB ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- --- ---------------- ------------- ---------
7 1 436474 400 YES INACTIVE 1.3795E+13 06-MAY-14
8 2 175639 400 NO CURRENT 1.3795E+13 06-MAY-14
9 1 436475 400 NO CURRENT 1.3795E+13 06-MAY-14
10 2 0 400 YES UNUSED 0
12 2 0 400 YES UNUSED 0
SQL> select * from v$logfile
GROUP# STATUS TYPE MEMBER IS_RECOVERY_DEST_FILE
---------- ------- ------- ------------------------------- ------------------------
7 ONLINE /oradata/orcl/redo07a.log NO
7 ONLINE /oradata/orcl/redo07b.log NO
8 ONLINE /oradata/orcl/redo08a.log NO
8 ONLINE /oradata/orcl/redo08b.log NO
9 ONLINE /oradata/orcl/redo09a.log NO
9 ONLINE /oradata/orcl/redo09b.log NO
10 ONLINE /oradata/orcl/redo10a.log NO
10 ONLINE /oradata/orcl/redo10b.log NO
11 ONLINE /oradata/orcl/redo11a.log NO
11 ONLINE /oradata/orcl/redo11b.log NO
12 ONLINE /oradata/orcl/redo12a.log NO
12 ONLINE /oradata/orcl/redo12b.log NO
到此 RAC的新redolog 就增加完了
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