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Oracle 11G DataGuard ORA-16086问题修复详细过程

原创 Oracle 作者:mchdba 时间:2014-07-22 16:25:22 1 删除 编辑
1,问题描述,standby从库没有应用redo日志
Tue Jul 22 09:05:07 2014
RFS[8852]: Assigned to RFS process 12956
RFS[8852]: Identified database type as 'physical standby': Client is ARCH pid 16028
Tue Jul 22 09:05:09 2014
RFS[8853]: Assigned to RFS process 12958
RFS[8853]: Identified database type as 'physical standby': Client is LGWR SYNC pid 15950
Primary database is in MAXIMUM AVAILABILITY mode
Standby controlfile consistent with primary
Standby controlfile consistent with primary
RFS[8853]: No standby redo logfiles selected (reason:7)
Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_rfs_12958.trc:
ORA-16086: Redo data cannot be written to the standby redo log
Tue Jul 22 09:11:07 2014
RFS[8854]: Assigned to RFS process 12976
RFS[8854]: Identified database type as 'physical standby': Client is ARCH pid 16028
Tue Jul 22 09:11:07 2014
RFS[8855]: Assigned to RFS process 12978
RFS[8855]: Identified database type as 'physical standby': Client is LGWR SYNC pid 15950
Primary database is in MAXIMUM AVAILABILITY mode
Standby controlfile consistent with primary
Standby controlfile consistent with primary
RFS[8855]: No standby redo logfiles selected (reason:7)
Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_rfs_12978.trc:
ORA-16086: Redo data cannot be written to the standby redo log

2,在从库查看redo日志信息
SQL> show parameter log_file_name_convert;                                                                                                                                                     

NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
log_file_name_convert     string /home/oradata/powerdes, /home/
oradata/powerdes
SQL>                                                                                                                                                                                           
SQL>                                                                                                                                                                                           
SQL> select group#,member from v$logfile;                                                                                                                                                      

    GROUP#
----------
MEMBER
--------------------------------------------------------------------------------
3
/home/oradata/powerdes/redo03.log

2
/home/oradata/powerdes/redo02.log

1
/home/oradata/powerdes/redo01.log


SQL> select GROUP#,FIRST_CHANGE#,SEQUENCE#,STATUS from v$log;                                                                                                                                  

    GROUP# FIRST_CHANGE#  SEQUENCE# STATUS
---------- ------------- ---------- ----------------
1    1.0533E+10      23999 CLEARING_CURRENT
2    1.0533E+10      23997 CLEARING
3    1.0533E+10      23998 CLEARING

SQL>                        


SQL> select group#,bytes/1024/1024,members,status from v$log;                                                                                                                                  

    GROUP# BYTES/1024/1024    MEMBERS STATUS
---------- --------------- ---------- ----------------
1 50    1 CLEARING
2 50    1 CLEARING_CURRENT
3 50    1 CLEARING

SQL> 

先暂停redo log日志:
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;

执行更新日志操作:
alter database clear logfile group 1;
alter database clear logfile group 2;
alter database clear logfile group 3;

SQL> alter database clear logfile group 1;                                                                                                                                                     
alter database clear logfile group 1
*
ERROR at line 1:
ORA-01156: recovery or flashback in progress may need access to files

报错是因为MFS进程锁定日志了,所以需要先停应用再更新日志操作
alter database recover managed standby database cancel;
SQL> alter database recover managed standby database cancel;                                                                                                                                   
Database altered.
SQL> alter database clear logfile group 1;                                                                                                                                                                                                                                                                                                                                                    
Database altered.
SQL> alter database clear logfile group 2;                                                                                                                                                     
Database altered.
SQL> alter database clear logfile group 3;                                                                                                                                                     
Database altered.
SQL>   

然后再执行redo应用
SQL> alter database recover managed standby database disconnect from session;                                                                                                                  
Database altered.
SQL>

查看redo应用情况
SQL> select name,creator,sequence#,applied,completion_time from v$archived_log; 
都是NO

3,重建redo log
再查看下看一下现在的redo log状态
select group#,bytes/1024/1024,members,status from v$log;
SQL> select group#,bytes/1024/1024,members,status from v$log;                                                                                                                                  


    GROUP# BYTES/1024/1024    MEMBERS STATUS
---------- --------------- ---------- ----------------
1 50    1 UNUSED
2 50    1 CLEARING
3 50    1 CLEARING_CURRENT

redo log损坏,但是clear不管用,因为是备库 read-only不让切换日志
重建redo日志文件,先停redo应用
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;

alter database add logfile group 4 ('/home/oradata/powerdes/redo04.log') size 50M;
alter database add logfile group 5 ('/home/oradata/powerdes/redo05.log') size 50M;
alter database add logfile group 6 ('/home/oradata/powerdes/redo06.log') size 50M;

日志管理是自动的,所以不能操作,要先设置成手动管理的
SQL> alter system set standby_file_management='manual';
System altered.
SQL> alter database add logfile group 4 ('/home/oradata/powerdes/redo04.log') size 50M;
Database altered.
SQL> alter database add logfile group 5 ('/home/oradata/powerdes/redo05.log') size 50M;
Database altered.
SQL> alter database add logfile group 6 ('/home/oradata/powerdes/redo06.log') size 50M;  
Database altered.
SQL> 

查看一下日志状态
SQL> select group#,bytes/1024/1024,members,status from v$log;                                                                                                                                  
    GROUP# BYTES/1024/1024    MEMBERS STATUS
---------- --------------- ---------- ----------------
1 50    1 CLEARING_CURRENT
2 50    1 CLEARING
3 50    1 CLEARING
4 50    1 UNUSED
5 50    1 UNUSED
6 50    1 UNUSED

6 rows selected.

清空redo日志组
SQL>   
alter database clear logfile group 1;
alter database clear logfile group 2;
alter database clear logfile group 3;

SQL>                                                                                                                                                                                           
alter database clear logfile group 1;                                                                                                                                                          
alter database clear logfile group 2;                                                                                                                                                          
alter database clear logfile group 3;                                                                                                                                                          
                                                                                                                                                                                               
Database altered.

SQL>                                                                                                                                                                                           
Database altered.

SQL>                                                                                                                                                                                           
Database altered.

SQL> 

查看redo 日志组信息
SQL> select group#,bytes/1024/1024,members,status from v$log;                                                                                                                                  
    GROUP# BYTES/1024/1024    MEMBERS STATUS
---------- --------------- ---------- ----------------
1 50    1 CURRENT
2 50    1 UNUSED
3 50    1 UNUSED
4 50    1 UNUSED
5 50    1 UNUSED
6 50    1 UNUSED

6 rows selected.

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

SQL>                                                                                                                                                                                           
alter database drop logfile group 1;                                                                                                                                                           
alter database drop logfile group 2;                                                                                                                                                           
alter database drop logfile group 3;                                                                                                                                                           
                                                                                                                                                                                               
Database altered.

SQL>                                                                                                                                                                                           
Database altered.

SQL> alter database drop logfile group 3
*
ERROR at line 1:
ORA-01623: log 3 is current log for instance powerdes (thread 1) - cannot drop
ORA-00312: online log 3 thread 1: '/home/oradata/powerdes/redo03.log'

SQL>   

4,检查归档文件是否完整
从库redo log损坏了的话,只要从库的归档日志在,还是可以修复的,不用重新做Standy。
从库上执行check:
SQL> SELECT DISTINCT THREAD#,max(SEQUENCE#) OVER(PARTITION BY THREAD#) A FROM V$ARCHIVED_LOG;                                                                                                  
   THREAD#    A
---------- ----------
1 23826
SQL> 

主库上执行check:
SQL> SELECT DISTINCT THREAD#,max(SEQUENCE#) OVER(PARTITION BY THREAD#) A FROM V$ARCHIVED_LOG;                                                                                                  
   THREAD#    A
---------- ----------
1 24022

SQL>  
取出primary和standy库上各线程已经归档文件最大序列号,看到两者不相同,必须将多出的序列号对应的归档文件复制到standy库。
也就是说主库从库的归档日志相差蛮大的。

如何查看归档路径,最高可用模式的时候 dg会尽力的让日志应用到standby
去查一下
SELECT GROUP#,THREAD#,SEQUENCE#,ARCHIVED,STATUS FROM V$STANDBY_LOG;
从库:
SQL> SELECT GROUP#,THREAD#,SEQUENCE#,ARCHIVED,STATUS FROM V$STANDBY_LOG;                                                                                                                       
no rows selected
SQL>

主库:
SQL> SELECT GROUP#,THREAD#,SEQUENCE#,ARCHIVED,STATUS FROM V$STANDBY_LOG;                                                                                                                       
no rows selected
SQL> 
表名从库的standby log都空的,需要重建standby log。

5,确定归档日志有没有写到从库:
所以用的lgwr进程,用lgwr进程进行传输日志,而其他模式用arch传输日志是等到日志写到归档的过程中传输过去,最近你没有改过从库的保护模式吧。
主库上查看下redo log的大小:
select GROUP#,BYTES/1024/1024,STATUS from v$log;
SQL> select GROUP#,BYTES/1024/1024,STATUS from v$log;                                                                                                                                          
    GROUP# BYTES/1024/1024 STATUS
---------- --------------- ----------------
1 50 CURRENT
2 50 INACTIVE
3 50 ACTIVE

SQL>

确定日志有没有写到从库:
执行: select name,sequence#,applied from v$archived_log;
NAME
--------------------------------------------------------------------------------
 SEQUENCE# APPLIED
---------- ---------
/oracle/app/oracle/flash_recovery_area/archivelog/1_24161_821708334.dbf
     24161 NO

/oracle/app/oracle/flash_recovery_area/archivelog/1_24162_821708334.dbf
     24162 NO

从库上归档日志:
NAME
--------------------------------------------------------------------------------
 SEQUENCE# APPLIED
---------- ---------
/data/oracle/oradgdata/standby_archive/1_24072_821708334.dbf
     24072 NO

2800 rows selected.
看到这里,从库上,最后一个日志是24072,比主库上的24162要低很多,

再去查下主库的归档日志路径:
select name from v$archived_log;找到归档日志路径/oracle/app/oracle/flash_recovery_area/archivelog/
ll /oracle/app/oracle/flash_recovery_area/archivelog/看到最后一个归档日志是:
-rw-r----- 1 oracle oinstall  2808832 Jul 22 09:24 1_24162_821708334.dbf
-rw-r----- 1 oracle oinstall  3072512 Jul 22 09:30 1_24163_821708334.dbf
再去主库的归档日志路径上面check下,是否有从库最后一个归档日志24072
[oracle@localhost ~]$ ll /oracle/app/oracle/flash_recovery_area/archivelog/*24072*.dbf
-rw-r----- 1 oracle oinstall 1992704 Jul 22 01:00 /oracle/app/oracle/flash_recovery_area/archivelog/1_24072_821708334.dbf
[oracle@localhost ~]$

检查下主库从库的归档管理模式
从库:
SQL>  show parameter standby_file_management;                                                                                                                                                  
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management     string MANUAL
SQL>      

主库:
SQL> show parameter standby_file_management;                                                                                                                                                   
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management     string AUTO
SQL>

看到从库跟主库不一致,需要手动将从库上面的MANUAL修改成AUTO。
 alter system set standby_file_management='AUTO';    
SQL>  alter system set standby_file_management='AUTO';
System altered.
SQL>
SQL>  show parameter standby_file_management;                                                                                                                                                  
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management     string AUTO
SQL> 

去主库上查看一下归档日志的状态
SQL> show parameter log_archive_dest_state_2;                                                                                                                                                  
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_state_2     string ENABLE
log_archive_dest_state_20     string enable
log_archive_dest_state_21     string enable
log_archive_dest_state_22     string enable
log_archive_dest_state_23     string enable
log_archive_dest_state_24     string enable
log_archive_dest_state_25     string enable
log_archive_dest_state_26     string enable
log_archive_dest_state_27     string enable
log_archive_dest_state_28     string enable
log_archive_dest_state_29     string enable
SQL> 

6,检查alert信息
因为主库1点有oracle归档日志,所以去主库从库看下alert日志信息:
主库信息:
ll /oracle/app/oracle/diag/rdbms/pdunq/powerdes/trace/alert_powerdes.log
Tue Jul 22 01:00:02 2014
ALTER SYSTEM ARCHIVE LOG
Tue Jul 22 01:00:02 2014
Thread 1 advanced to log sequence 24073 (LGWR switch)
  Current log# 1 seq# 24073 mem# 0: /home/oradata/powerdes/redo01.log
Archived Log entry 46639 added for thread 1 sequence 24072 ID 0xca2ab4eb dest 1:
Tue Jul 22 01:00:17 2014
Errors in file /oracle/app/oracle/diag/rdbms/pdunq/powerdes/trace/powerdes_lgwr_15950.trc:
ORA-16086: Redo data cannot be written to the standby redo log
LGWR: Failed to archive log 2 thread 1 sequence 24074 (16086)
Thread 1 advanced to log sequence 24074 (LGWR switch)
  Current log# 2 seq# 24074 mem# 0: /home/oradata/powerdes/redo02.log
Tue Jul 22 01:00:19 2014
Archived Log entry 46641 added for thread 1 sequence 24073 ID 0xca2ab4eb dest 1:
Tue Jul 22 01:02:28 2014
backup piece header validation failure for handle /data/oracle/backup/data/ctl_auto/c-3391761643-20140721-00
backup piece header validation failure for handle /data/oracle/backup/data/ctl_auto/c-3391761643-20140721-01

ll /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/alert_powerdes.log
从库信息:
Tue Jul 22 01:04:48 2014
RFS[8692]: Assigned to RFS process 10970
RFS[8692]: Identified database type as 'physical standby': Client is ARCH pid 16028
Tue Jul 22 01:04:49 2014
RFS[8693]: Assigned to RFS process 10972
RFS[8693]: Identified database type as 'physical standby': Client is LGWR SYNC pid 15950
Primary database is in MAXIMUM AVAILABILITY mode
Standby controlfile consistent with primary
Standby controlfile consistent with primary
RFS[8693]: No standby redo logfiles selected (reason:7)
Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_rfs_10972.trc:
ORA-16086: Redo data cannot be written to the standby redo log
Tue Jul 22 01:10:48 2014
RFS[8694]: Assigned to RFS process 10989
RFS[8694]: Identified database type as 'physical standby': Client is ARCH pid 16028
Tue Jul 22 01:10:51 2014
RFS[8695]: Assigned to RFS process 10992
RFS[8695]: Identified database type as 'physical standby': Client is LGWR SYNC pid 15950


7,在从库上操作,还原昨天的logfile组:
先停止redo应用
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
然后设置成manual模式
 alter system set standby_file_management='MANUAL';    
重建redo日志文件
alter database add logfile group 1 ('/home/oradata/powerdes/redo01.log') size 50M;
alter database add logfile group 2 ('/home/oradata/powerdes/redo02.log') size 50M;
alter database drop logfile group 4;
alter database drop logfile group 5;
alter database drop logfile group 6;
SQL> alter database add logfile group 1 ('/home/oradata/powerdes/redo01.log') size 50M;                                                                                                        
alter database add logfile group 1 ('/home/oradata/powerdes/redo01.log') size 50M                                                                                                              
*
ERROR at line 1:
ORA-01275: Operation ADD LOGFILE is not allowed if standby file management is
automatic.
SQL> 
看到报错,需要去从库删除已经存在的redo01和redo02日志
[oracle@localhost dbs]$ mv /home/oradata/powerdes/redo01.log /home/oradata/powerdes/bak.redo01.log.20140722
[oracle@localhost dbs]$ mv /home/oradata/powerdes/redo02.log /home/oradata/powerdes/bak.redo02.log.20140722
然后再在从库执行如下还原日志操作,成功了
alter database add logfile group 1 ('/home/oradata/powerdes/redo01.log') size 50M;
alter database add logfile group 2 ('/home/oradata/powerdes/redo02.log') size 50M;
alter database drop logfile group 4;
alter database drop logfile group 5;
alter database drop logfile group 6;

去主库从库执行,不分先后顺序:
alter database add standby logfile group 4 ('/home/oradata/powerdes/redo_dg_01.log') size 50m;
alter database add standby logfile group 5 ('/home/oradata/powerdes/redo_dg_02.log') size 50m;
alter database add standby logfile group 6 ('/home/oradata/powerdes/redo_dg_03.log') size 50m;

执行redo应用:
alter database recover managed standby database disconnect from session;
SQL> alter database recover managed standby database disconnect from session;  
Database altered.
SQL> 

select name,sequence#,applied from v$archived_log;
还是No,没有被应用成YES。
 alter system set standby_file_management='AUTO';    
SQL>  alter system set standby_file_management='AUTO';                                                                                                                                         
System altered.
SQL>                                                                                                                                                                                           
SQL> show parameter standby_file_management;                                                                                                                                                   
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
standby_file_management     string AUTO
SQL>   

然后再在从库上面执行redo应用
alter database recover managed standby database disconnect from session;

8,尝试下关闭再重启从库
SHUTDOWN IMMEDIATE;
下面是alert信息:
  1. Tue Jul 22 11:04:42 2014
  2. MRP0: Background Media Recovery cancelled with status 16037
  3. Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_pr00_13338.trc:
  4. ORA-16037: user requested cancel of managed recovery operation
  5. Recovery
  6. Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_pr00_13338.trc:
  7. ORA-16037: user requested cancel of managed recovery operation
  8. Waiting for MRP0 pid 13335 to terminate
  9. Tue Jul 22 11:04:44 2014
  10. MRP0: Background Media Recovery process shutdown (powerdes)
  11. License high water mark = 40
  12. ALTER DATABASE CLOSE NORMAL
  13. Tue Jul 22 11:04:45 2014
  14. SMON: disabling cache recovery
  15. Completed: ALTER DATABASE CLOSE NORMAL
  16. ALTER DATABASE DISMOUNT
  17. Completed: ALTER DATABASE DISMOUNT
  18. ARCH: Archival disabled due to shutdown: 1089
  19. Shutting down archive processes
  20. Archiving is disabled
  21. Tue Jul 22 11:04:46 2014
  22. ARCH shutting down
  23. Tue Jul 22 11:04:46 2014
  24. ARCH shutting down
  25. Tue Jul 22 11:04:46 2014
  26. ARCj: Archival stoppedTue Jul 22 11:04:46 2014
  27. ARCH shutting downTue Jul 22 11:04:46 2014


  28. ARCH shutting down


  29. ARCH shutting down
  30. Tue Jul 22 11:04:46 2014
  31. ARCH shutting downARCi: Archival stopped


  32. Tue Jul 22 11:04:46 2014
  33. ARCH shutting down
  34. Tue Jul 22 11:04:46 2014
  35. ARCH shutting down
  36. ARCf: Archival stopped
  37. ARCg: Archival stoppedARCh: Archival stopped
  38. Tue Jul 22 11:04:46 2014


  39. ARCH shutting downARCe: Archival stopped
  40. Tue Jul 22 11:04:46 2014


  41. ARCH shutting downTue Jul 22 11:04:46 2014
  42. ARCd: Archival stopped
  43. ARCH shutting downTue Jul 22 11:04:46 2014




  44. ARCc: Archival stoppedTue Jul 22 11:04:46 2014
  45. ARCH shutting downARCH shutting down
  46. Tue Jul 22 11:04:46 2014


  47. Tue Jul 22 11:04:46 2014


  48. Tue Jul 22 11:04:46 2014
  49. ARCH shutting downTue Jul 22 11:04:46 2014
  50. ARCH shutting down
  51. ARCH shutting downARCa: Archival stopped


  52. ARC9: Archival stopped
  53. ARCH shutting down
  54. ARC7: Archival stopped


  55. ARCb: Archival stopped
  56. ARC6: Archival stoppedARC5: Archival stoppedTue Jul 22 11:04:46 2014




  57. ARCH shutting downARC8: Archival stopped


  58. ARC4: Archival stopped
  59. ARC2: Archival stopped
  60. ARC3: Archival stopped
  61. Tue Jul 22 11:04:46 2014
  62. ARCH shutting down
  63. ARC1: Archival stoppedTue Jul 22 11:04:46 2014


  64. ARCH shutting down
  65. ARC0: Archival stopped
  66. ARCH: Archival disabled due to shutdown: 1089
  67. Shutting down archive processes
  68. Archiving is disabled
  69. Archive process shutdown avoided: 0 active
  70. Tue Jul 22 11:04:48 2014
  71. Stopping background process VKTM:
  72. Tue Jul 22 11:04:50 2014
  73. Instance shutdown complete
再启动从库
STARTUP MOUNT;
再应用redo应用
alter database recover managed standby database disconnect from session;
查看是否有yes
select name,sequence#,applied from v$archived_log;
select sequence#,applied from v$archived_log;
还是NO,没有被应用
最后执行
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
在检查select sequence#,applied from v$archived_log;还是No,日志没有被应用。

查看归档日志路径:
select name from v$archived_log; 

查看主库备份记录策略:
RMAN> show retention policy;                                                                                                                                                                   
RMAN configuration parameters for database with db_unique_name PDUNQ are:                                                                                                                      
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 15 DAYS;

9,从库上面执行恢复归档日志,这个过程比较慢,耗时比较长
 recover automatic standby database ;
 SQL>  recover automatic standby database ;                                                                                                                                                     
                                                                                                                                                                                               
ORA-00279: change 10533608939 generated at 07/22/2014 14:00:38 needed for                                                                                                                      
thread 1
ORA-00289: suggestion :
/data/oracle/oradgdata/standby_archive/1_24178_821708334.dbf
ORA-00280: change 10533608939 for thread 1 is in sequence #24178
ORA-00278: log file
'/data/oracle/oradgdata/standby_archive/1_24178_821708334.dbf' no longer needed
for this recovery
ORA-16145: archival for thread# 1 sequence# 24178 in progress

Specify log: {=suggested | filename | AUTO | CANCEL}
ORA-16145: archival for thread# 1 sequence# 24178 in progress

SQL> 

如下是alert日志信息:
Media Recovery Log /data/oracle/oradgdata/standby_archive/1_24177_821708334.dbf
Tue Jul 22 14:16:58 2014
Media Recovery Log /data/oracle/oradgdata/standby_archive/1_24178_821708334.dbf
Tue Jul 22 14:16:59 2014
MRP: Archival for thread 1 sequence 24178 in progress
Standby Managed Recovery operation not detected
Errors with log /data/oracle/oradgdata/standby_archive/1_24178_821708334.dbf
Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_pr00_13910.trc:
ORA-16145: archival for thread# 1 sequence# 24178 in progress
Tue Jul 22 14:17:13 2014
ORA-279 signalled during: ALTER DATABASE RECOVER  automatic standby database   ...
ALTER DATABASE RECOVER    CONTINUE DEFAULT  
Media Recovery Log /data/oracle/oradgdata/standby_archive/1_24178_821708334.dbf
Tue Jul 22 14:17:13 2014
MRP: Archival for thread 1 sequence 24178 in progress
Standby Managed Recovery operation not detected
Errors with log /data/oracle/oradgdata/standby_archive/1_24178_821708334.dbf
Errors in file /oracle/app/oracle/diag/rdbms/pddgunq/powerdes/trace/powerdes_pr00_13910.trc:
ORA-16145: archival for thread# 1 sequence# 24178 in progress
ORA-16145 signalled during: ALTER DATABASE RECOVER    CONTINUE DEFAULT  ...
ALTER DATABASE RECOVER CANCEL 
Media Recovery Canceled
Completed: ALTER DATABASE RECOVER CANCEL 

然后启动redo应用
alter database recover managed standby database disconnect from session;
SQL> alter database recover managed standby database disconnect from session;                                                                                                                  
Database altered.

去从库上检查日志是否已经应用成YES
SQL> select sequence#,applied from v$archived_log;
 SEQUENCE# APPLIED
---------- ---------
     24172 YES
     24170 YES
     24169 YES
     24173 YES
     24176 YES
     24177 YES
2800 rows selected.

再去主库上切换下日志,看下新的24178归档日志是否传输过来,是否应用成YES:
alter system switch logfile;
SQL> alter system switch logfile;                                                                                                                                                              
System altered.
SQL> 

去从库上面执行检查
SQL> select sequence#,applied from v$archived_log;
 SEQUENCE# APPLIED
---------- ---------
     24170 YES
     24169 YES
     24173 YES
     24176 YES
     24177 YES
     24178 IN-MEMORY

2800 rows selected.
再继续检查check下,applied就变成YES了
 SEQUENCE# APPLIED
---------- ---------
     24170 YES
     24169 YES
     24173 YES
     24176 YES
     24177 YES
     24178 YES
2800 rows selected.

停止redo应用
alter database recover managed standby database cancel;
再打开open模式,将从库打开供大家查询数据
alter database open read only;
再起动redo应用
alter database recover managed standby database disconnect from session;

10,总结2个操作:
一是重建了redo log,添加了3组standby log:
alter database add logfile group 1 ('/home/oradata/powerdes/redo01.log') size 50M;
alter database add logfile group 2 ('/home/oradata/powerdes/redo02.log') size 50M;
alter database drop logfile group 4;
alter database drop logfile group 5;
alter database drop logfile group 6;
alter database add standby logfile group 4 ('/home/oradata/powerdes/redo_dg_01.log') size 50m;
alter database add standby logfile group 5 ('/home/oradata/powerdes/redo_dg_02.log') size 50m;
alter database add standby logfile group 6 ('/home/oradata/powerdes/redo_dg_03.log') size 50m;

二是在从库上恢复归档日志:
RECOVER AUTOMATIC STANDBY DATABASE ;

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