About the Restrictions of Dropping Online Redo

Student Guide,7-13, If the database is running in ARCHIVELOG mode and the log file group to which the
member belongs is not archived, then the member cannot be dropped.
but:
SQL> archive log list
Database log mode Archive Mode
Automatic archival Disabled
Archive destination E:\oracle\admin\archive_log
Oldest online log sequence 1043
Next log sequence to archive 1045
Current log sequence 1047
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIME
1 1 1044 1048576 1 YES INACTIVE
1762339 2005-06-01 13:44:19
2 1 1043 1048576 1 YES INACTIVE
1762335 2005-06-01 13:44:12
3 1 1045 1048576 2 NO INACTIVE (*****i want to delete group 3 member*****)
1762344 2005-06-01 13:44:33
4 1 1046 1048576 1 NO INACTIVE
1762455 2005-06-01 13:46:11
5 1 1047 1048576 1 NO CURRENT
1762460 2005-06-01 13:46:23
SQL> alter database drop logfile member
2 .
SQL> select * from v$logfile;
GROUP# STATUS TYPE
MEMBER
1 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO01.LOG
2 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO02.LOG
3 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03.LOG
4 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO04.LOG
5 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO05.LOG
3 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03B.LOG (*****i want to delete group 3 member*****)
6 rows selected.
SQL> alter database drop logfile member 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03B.
LOG'
2 /
Database altered.
SQL>
it is done successfully, why?

yes ,i drop group 3(ARCHIVED=NO STATUS=INACTIVE) ,it report ORA error ;
and if drop member ("ARCHIVED=NO STATUS=CURRENT") , it report ORA error also.
show:
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRS
T_CHANGE# FIRST_TIME
1 1 1049 1048576 1 NO INACTIVE
1762943 2005-06-01 14:10:40
2 1 1048 1048576 1 YES INACTIVE
1762941 2005-06-01 14:10:39
3 1 1050 1048576 1 NO INACTIVE
1766105 2005-06-01 16:39:51
4 1 1051 1048576 1 NO INACTIVE
1766107 2005-06-01 16:39:52
5 1 1052 1048576 1 NO CURRENT
1766110 2005-06-01 16:39:52
Elapsed: 00:00:00.00
SQL> alter database drop logfile group 3;
alter database drop logfile group 3
ERROR at line 1:
ORA-00350: log 3 of thread 1 needs to be archived
ORA-00312: online log 3 thread 1: 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03.LOG'
Elapsed: 00:00:00.00
SQL> alter database add logfile member 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03b.L
OG' to group 3;
Database altered.
Elapsed: 00:00:02.03
SQL> start reboot
Database closed.
Database dismounted.
ORACLE instance shut down.
ORACLE instance started.
Total System Global Area 34675092 bytes
Fixed Size 453012 bytes
Variable Size 25165824 bytes
Database Buffers 8388608 bytes
Redo Buffers 667648 bytes
Database mounted.
Database opened.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRS
T_CHANGE# FIRST_TIME
1 1 1049 1048576 1 NO INACTIVE
1762943 2005-06-01 14:10:40
2 1 1048 1048576 1 YES INACTIVE
1762941 2005-06-01 14:10:39
3 1 1050 1048576 2 NO INACTIVE
1766105 2005-06-01 16:39:51
4 1 1051 1048576 1 NO INACTIVE
1766107 2005-06-01 16:39:52
5 1 1052 1048576 1 NO CURRENT
1766110 2005-06-01 16:39:52
Elapsed: 00:00:00.00
SQL> archive log start
Statement processed.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRS
T_CHANGE# FIRST_TIME
1 1 1049 1048576 1 YES INACTIVE
1762943 2005-06-01 14:10:40
2 1 1048 1048576 1 YES INACTIVE
1762941 2005-06-01 14:10:39
3 1 1050 1048576 2 YES INACTIVE
1766105 2005-06-01 16:39:51
4 1 1051 1048576 1 YES INACTIVE
1766107 2005-06-01 16:39:52
5 1 1052 1048576 1 NO CURRENT
1766110 2005-06-01 16:39:52
Elapsed: 00:00:00.00
SQL> alter system switch logfile;
System altered.
Elapsed: 00:00:00.02
SQL> alter system switch logfile;
System altered.
Elapsed: 00:00:00.03
SQL> alter system switch logfile;
System altered.
Elapsed: 00:00:00.03
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRS
T_CHANGE# FIRST_TIME
1 1 1054 1048576 1 YES INACTIVE
1766281 2005-06-01 16:44:22
2 1 1053 1048576 1 YES INACTIVE
1766279 2005-06-01 16:44:19
3 1 1055 1048576 2 NO CURRENT
1766288 2005-06-01 16:44:37
4 1 1051 1048576 1 YES INACTIVE
1766107 2005-06-01 16:39:52
5 1 1052 1048576 1 YES INACTIVE
1766110 2005-06-01 16:39:52
Elapsed: 00:00:00.00
SQL> select * from v$logfile;
GROUP# STATUS TYPE
MEMBER
1 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO01.LOG
2 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO02.LOG
3 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03.LOG
4 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO04.LOG
5 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO05.LOG
3 ONLINE
E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03B.LOG
6 rows selected.
Elapsed: 00:00:00.03
SQL> alter database drop logfile member 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03b.
LOG'
2 /
alter database drop logfile member 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03b.LOG'
ERROR at line 1:
ORA-01609: log 3 is the current log for thread 1 - cannot drop members
ORA-00312: online log 3 thread 1: 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03.LOG'
ORA-00312: online log 3 thread 1: 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03B.LOG'
Elapsed: 00:00:00.00
SQL> alter system switch logfile;
System altered.
Elapsed: 00:00:00.03
SQL> alter database drop logfile member 'E:\ORACLE\ADMIN\WOSON\DATAFILE\REDO03b.
LOG'
2 /
Database altered.
Elapsed: 00:00:02.00
SQL>

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You should not perform any changes in Standby. Even if those exist online redo log files, whats the difficulty you have seen?
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Hi,
Version 11202.
Primary on machine A
Standby on machine B
Following note: 11.2 Data Guard Physical Standby Switchover Best Practices using SQL*Plus [ID 1304939.1].
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2)
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I have used my note many times in production.
For example they needed to do some power work on the main server room a few months back on the weekend.
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1.
getting ORA-01017 issues in Oracle forms ( Application ) after the switchover to standby.
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ROCK wrote:
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