E:\My Documents\radix\Oracle\常用sql>sqlplus /nolog

SQL*Plus: Release 11.2.0.1.0 Production on Thu Dec 13 21:09:30 2012

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

SQL>conn / as sysdba;

Connected.

查询当前状态redolog

SQL>select group#,sequence#,bytes,members,status from v$log;

GROUP#  SEQUENCE#      BYTES    MEMBERS STATUS

---------- ---------- ---------- ---------- ----------------

1         61   52428800          1 INACTIVE

2         64   52428800          1 CURRENT

3          0   52428800          1 UNUSED

SQL>alter database add logfile member 'D:\oracle\oradata\test\REDO03_B.log' to group 3;

Database altered.

SQL>select * from v$logfile;

GROUP# STATUS  TYPE    MEMBER                                   IS_

---------- ------- ------- ---------------------------------------- ---

3         ONLINE  D:\ORACLE\ORADATA\TEST\REDO03.LOG        NO

2         ONLINE  D:\ORACLE\ORADATA\TEST\REDO02.LOG        NO

1         ONLINE  D:\ORACLE\ORADATA\TEST\REDO01.LOG        NO

3 INVALID ONLINE  D:\ORACLE\ORADATA\TEST\REDO03_B.LOG      NO

SQL>select group#,sequence#,bytes,members,status from v$log;

GROUP#  SEQUENCE#      BYTES    MEMBERS STATUS

---------- ---------- ---------- ---------- ----------------

1         61   52428800          1 INACTIVE

2         64   52428800          1 CURRENT

3          0   52428800          2 UNUSED

切换logfile到第三组；

SQL>alter system switch logfile ;

System altered.

SQL>select group#,sequence#,bytes,members,status from v$log;

GROUP#  SEQUENCE#      BYTES    MEMBERS STATUS

---------- ---------- ---------- ---------- ----------------

1         61   52428800          1 INACTIVE

2         64   52428800          1 ACTIVE

3         65   52428800          2 CURRENT

将redolog日志归档

SQL>alter system checkpoint;

System altered.

SQL>select group#,sequence#,bytes,members,status from v$log;

GROUP#  SEQUENCE#      BYTES    MEMBERS STATUS

---------- ---------- ---------- ---------- ----------------

1         61   52428800          1 INACTIVE

2         64   52428800          1 INACTIVE

3         65   52428800          2 CURRENT

为前两组添加组成员

SQL>alter database add logfile member 'D:\oracle\oradata\test\REDO01_B.log' to group 1;

Database altered.

SQL>alter database add logfile member 'D:\oracle\oradata\test\REDO02_B.log' to group 2;

Database altered.

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

GROUP# MEMBER

---------- ----------------------------------------

3 D:\ORACLE\ORADATA\TEST\REDO03.LOG

2 D:\ORACLE\ORADATA\TEST\REDO02.LOG

1 D:\ORACLE\ORADATA\TEST\REDO01.LOG

3 D:\ORACLE\ORADATA\TEST\REDO03_B.LOG

1 D:\ORACLE\ORADATA\TEST\REDO01_B.LOG

2 D:\ORACLE\ORADATA\TEST\REDO02_B.LOG

6 rows selected.

SQL>select * from v$logfile;

GROUP# STATUS  TYPE    MEMBER                                   IS_

---------- ------- ------- ---------------------------------------- ---

3         ONLINE  D:\ORACLE\ORADATA\TEST\REDO03.LOG        NO

2         ONLINE  D:\ORACLE\ORADATA\TEST\REDO02.LOG        NO

1         ONLINE  D:\ORACLE\ORADATA\TEST\REDO01.LOG        NO

3         ONLINE  D:\ORACLE\ORADATA\TEST\REDO03_B.LOG      NO

1 INVALID ONLINE  D:\ORACLE\ORADATA\TEST\REDO01_B.LOG      NO

2 INVALID ONLINE  D:\ORACLE\ORADATA\TEST\REDO02_B.LOG      NO

6 rows selected.

SQL>alter system switch logfile;

System altered.

SQL>alter system switch logfile;

System altered.

SQL>select * from v$logfile;

GROUP# STATUS  TYPE    MEMBER                                   IS_

---------- ------- ------- ---------------------------------------- ---

3         ONLINE  D:\ORACLE\ORADATA\TEST\REDO03.LOG        NO

2         ONLINE  D:\ORACLE\ORADATA\TEST\REDO02.LOG        NO

1         ONLINE  D:\ORACLE\ORADATA\TEST\REDO01.LOG        NO

3         ONLINE  D:\ORACLE\ORADATA\TEST\REDO03_B.LOG      NO

1         ONLINE  D:\ORACLE\ORADATA\TEST\REDO01_B.LOG      NO

2         ONLINE  D:\ORACLE\ORADATA\TEST\REDO02_B.LOG      NO

6 rows selected.

SQL>select * from v$log;

GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME   NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ------------ ------------ ------------

1          1         66   52428800        512          2 YES ACTIVE                 2098256 13-DEC-12         2098259 13-DEC-12

2          1         67   52428800        512          2 NO  CURRENT                2098259 13-DEC-12      2.8147E+14

3          1         65   52428800        512          2 YES ACTIVE                 2098093 13-DEC-12         2098256 13-DEC-12

SQL>alter system checkpoint;

System altered.

SQL>select * from v$log;

GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME   NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ------------ ------------ ------------

1          1         66   52428800        512          2 YES INACTIVE               2098256 13-DEC-12         2098259 13-DEC-12

2          1         67   52428800        512          2 NO  CURRENT                2098259 13-DEC-12      2.8147E+14

3          1         65   52428800        512          2 YES INACTIVE2098093 13-DEC-12         209825613-DEC-12

SQL> select * from v$logfile; GROUP# STATUS TYPE MEMBER IS_ ---------- ------- ------- ---------------------------------------- --- 3 ONLINE D:\ORACLE\ORADATA\TEST\REDO03.LOG NO 2 ONLINE D:\ORACLE\ORADATA\TEST\REDO02.LOG NO 1 ONLINE D:\ORACLE\ORADATA\TEST\REDO01.LOG NO 3 ONLINE D:\ORACLE\ORADATA\TEST\REDO03_B.LOG NO 1 ONLINE D:\ORACLE\ORADATA\TEST\REDO01_B.LOG NO 2 ONLINE D:\ORACLE\ORADATA\TEST\REDO02_B.LOG NO 6 rows selected.