标签归档：undo丢失

数据库异常关闭，使用resetlogs方式重建控制文件，不包含undo表空间相关数据库，然后尝试resetlogs打开数据库，非常容易出现ORA-01173: data dictionary indicates missing data file from system tablespace之类的错误，本文通过模拟该错误，并简单提供解决方法
模拟ORA-01173错误

SQL> select * from v$version;
 
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

SQL> shutdown abort;
ORACLE instance shut down.

--除掉undo表空间相关数据库然后使用resetlogs模式重建控制文件

SQL> startup nomount;
ORACLE instance started.

Total System Global Area  175775744 bytes
Fixed Size                  1343668 bytes
Variable Size             117444428 bytes
Database Buffers           50331648 bytes
Redo Buffers                6656000 bytes
SQL> @/tmp/ctl.sql

Control file created.

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/u01/oracle/oradata/ora11g/system01.dbf'


SQL> recover database until cancel;
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done


SQL> recover database until cancel using backup controlfile;
ORA-00279: change 12696930512547 generated at 08/26/2013 14:43:13 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/ora11g/archivelog/1_8_824475918.dbf
ORA-00280: change 12696930512547 for thread 1 is in sequence #8


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel;
ORA-00308: cannot open archived log 'cancel;'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/u01/oracle/oradata/ora11g/system01.dbf'


ORA-01112: media recovery not started


SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/u01/oracle/oradata/ora11g/system01.dbf'


SQL> recover database until cancel using backup controlfile;
ORA-00279: change 12696930512547 generated at 08/26/2013 14:43:13 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/ora11g/archivelog/1_8_824475918.dbf
ORA-00280: change 12696930512547 for thread 1 is in sequence #8


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/oracle/oradata/ora11g/redo02.log
Log applied.
Media recovery complete.
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-01173: data dictionary indicates missing data file from system tablespace
Process ID: 15053
Session ID: 125 Serial number: 3

alert日志

Mon Aug 26 15:22:20 2013
alter database open resetlogs
RESETLOGS after complete recovery through change 12696930514503
Archived Log entry 1 added for thread 1 sequence 7 ID 0xfb91eb36 dest 1:
Archived Log entry 2 added for thread 1 sequence 8 ID 0xfb91eb36 dest 1:
Archived Log entry 3 added for thread 1 sequence 6 ID 0xfb91eb36 dest 1:
Clearing online redo logfile 1 /u01/oracle/oradata/ora11g/redo01.log
Clearing online log 1 of thread 1 sequence number 7
Clearing online redo logfile 1 complete
Clearing online redo logfile 2 /u01/oracle/oradata/ora11g/redo02.log
Clearing online log 2 of thread 1 sequence number 8
Clearing online redo logfile 2 complete
Clearing online redo logfile 3 /u01/oracle/oradata/ora11g/redo03.log
Clearing online log 3 of thread 1 sequence number 6
Clearing online redo logfile 3 complete
Resetting resetlogs activation ID 4220644150 (0xfb91eb36)
Online log /u01/oracle/oradata/ora11g/redo01.log: Thread 1 Group 1 was previously cleared
Online log /u01/oracle/oradata/ora11g/redo02.log: Thread 1 Group 2 was previously cleared
Online log /u01/oracle/oradata/ora11g/redo03.log: Thread 1 Group 3 was previously cleared
Mon Aug 26 15:22:26 2013
Setting recovery target incarnation to 2
Using SCN growth rate of 16384 per second
Mon Aug 26 15:22:26 2013
Assigning activation ID 4220652407 (0xfb920b77)
LGWR: STARTING ARCH PROCESSES
Mon Aug 26 15:22:26 2013
ARC0 started with pid=20, OS id=15131 
ARC0: Archival started
LGWR: STARTING ARCH PROCESSES COMPLETE
ARC0: STARTING ARCH PROCESSES
Mon Aug 26 15:22:27 2013
ARC1 started with pid=21, OS id=15135 
Mon Aug 26 15:22:27 2013
ARC2 started with pid=22, OS id=15139 
Thread 1 opened at log sequence 1
  Current log# 1 seq# 1 mem# 0: /u01/oracle/oradata/ora11g/redo01.log
Successful open of redo thread 1
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Mon Aug 26 15:22:27 2013
SMON: enabling cache recovery
Mon Aug 26 15:22:27 2013
ARC3 started with pid=23, OS id=15143 
ARC1: Archival started
ARC2: Archival started
ARC2: Becoming the 'no FAL' ARCH
ARC2: Becoming the 'no SRL' ARCH
ARC1: Becoming the heartbeat ARCH
Errors in file /u01/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_15053.trc:
ORA-01173: data dictionary indicates missing data file from system tablespace
Errors in file /u01/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_15053.trc:
ORA-01173: data dictionary indicates missing data file from system tablespace
Error 1173 happened during db open, shutting down database
USER (ospid: 15053): terminating the instance due to error 1173
Instance terminated by USER, pid = 15053
ORA-1092 signalled during: alter database open resetlogs...
opiodr aborting process unknown ospid (15053) as a result of ORA-1092
Mon Aug 26 15:22:29 2013
ORA-1092 : opitsk aborting process

解决方案
解决方案设置相关异常回滚段,然后屏蔽掉，数据库即可正常起来

--参数文件修改(使用event或者工具，系统命令等)
undo_management='manual'
_corrupted_rollback_segments

--重启数据库使得_corrupted_rollback_segments生效
shutdown immediate;
startup 

--尝试open数据库
recover database;
alter database open;

--新建undo
create undo tablespace undo_new datafile '' size 100m autoextend on next 10m maxsize 30G;

--删除老undo
drop tablespace old_undo

--修改参数
shutdonw immediate
undo_management='auto'
undo_tablespace='unod_new'

--启动数据库
startup

--逻辑导出数据，导入新库

姊妹篇:重建控制文件丢失undo异常恢复—ORA-600[25025]模拟与恢复