ORA-00376:file x cannot be read at this time
2013-06-19 20:27
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之前出现过机房断电情况,重启数据库后发现出现ORA-00376的错误。
通过查询数据文件状态:
SQL> select file_id,online_status from dba_data_files order by 1;
FILE_ID ONLINE_STATUS
---------- -------------
1 SYSTEM
2 ONLINE
3 ONLINE
4 ONLINE
5 RECOVER
6 ONLINE
7 RECOVER
8 ONLINE
9 ONLINE
10 ONLINE
11 RECOVER
12 ONLINE
13 RECOVER
14 RECOVER
15 RECOVER
16 RECOVER
文件中出现了大量的recover的状态,需要进行介质恢复。
SQL> select file#, status, fuzzy, checkpoint_time, checkpoint_change#,
resetlogs_change#, resetlogs_time from v$datafile_header where file#=5;
FILE# STATUS FUZZY CHECKPOINT_TIME CHECKPOINT_CHANGE# RESETLOGS_CHANGE# RESETLOGS_TIME
---------- ------- ----- --------------- ------------------ ----------------- --------------
5 OFFLINE YES 2013-6-19 9:52: 38391683 940976 2013-5-15 19:1
当前的数据文件的SCN号为 38391683,需要寻找别这个高的archive log 或redo log。
SQL> Select sequence#,name,first_change#,next_change# from v$archived_log;
SEQUENCE# NAME FIRST_CHANGE# NEXT_CHANGE#
---------- -------------------------------------------------------------------------------- ------------- ------------
465 D:\APP\ARCHIVELOG\ARC0000000465_0815512562.0001 36366097 36618224
466 D:\APP\ARCHIVELOG\ARC0000000466_0815512562.0001 36618224 36843775
467 D:\APP\ARCHIVELOG\ARC0000000467_0815512562.0001 36843775 37065721
468 D:\APP\ARCHIVELOG\ARC0000000468_0815512562.0001 37065721 37294978
469 D:\APP\ARCHIVELOG\ARC0000000469_0815512562.0001 37294978 37572830
470 D:\APP\ARCHIVELOG\ARC0000000470_0815512562.0001 37572830 37818186
471 D:\APP\ARCHIVELOG\ARC0000000471_0815512562.0001 37818186 38093499
472 D:\APP\ARCHIVELOG\ARC0000000472_0815512562.0001 38093499 38346397
473 D:\APP\ARCHIVELOG\ARC0000000473_0815512562.0001 38346397 38381157
很幸运,38391683大于473这个最大的archive log 的SCN,我不需archive log 的帮助。recover所需的信息在redo log 中。
例如:数据文件file_id为5的处于recover状态,执行
alter database recover datafile 5;
依次恢复状态为recover的数据文件。
再次查看online_status为offline状态,需要执行
Alter database datafile 5 online;
依次将处于offline的数据文件ONLINE。都online后数据库处于open状态了后,就可以用了。
如果数据库处于No Archive log 状态的时候,recover所需的信息只能从redo log 中获取,如果此时的redo log被overwrite了,将不能online数据文件,那只能想其他方法了。
Possible causes and solutions summary:
=====================================
A. Tablespace or Datafile offline.
B. Datafile does not exist at the OS level.
C. Datafile locked by Backup Software.
D. Incorrectly set ULIMIT on UNIX.
E. Rollback Segment with active transactions is unavailable
F. Possible Other Causes.
通过查询数据文件状态:
SQL> select file_id,online_status from dba_data_files order by 1;
FILE_ID ONLINE_STATUS
---------- -------------
1 SYSTEM
2 ONLINE
3 ONLINE
4 ONLINE
5 RECOVER
6 ONLINE
7 RECOVER
8 ONLINE
9 ONLINE
10 ONLINE
11 RECOVER
12 ONLINE
13 RECOVER
14 RECOVER
15 RECOVER
16 RECOVER
文件中出现了大量的recover的状态,需要进行介质恢复。
SQL> select file#, status, fuzzy, checkpoint_time, checkpoint_change#,
resetlogs_change#, resetlogs_time from v$datafile_header where file#=5;
FILE# STATUS FUZZY CHECKPOINT_TIME CHECKPOINT_CHANGE# RESETLOGS_CHANGE# RESETLOGS_TIME
---------- ------- ----- --------------- ------------------ ----------------- --------------
5 OFFLINE YES 2013-6-19 9:52: 38391683 940976 2013-5-15 19:1
当前的数据文件的SCN号为 38391683,需要寻找别这个高的archive log 或redo log。
SQL> Select sequence#,name,first_change#,next_change# from v$archived_log;
SEQUENCE# NAME FIRST_CHANGE# NEXT_CHANGE#
---------- -------------------------------------------------------------------------------- ------------- ------------
465 D:\APP\ARCHIVELOG\ARC0000000465_0815512562.0001 36366097 36618224
466 D:\APP\ARCHIVELOG\ARC0000000466_0815512562.0001 36618224 36843775
467 D:\APP\ARCHIVELOG\ARC0000000467_0815512562.0001 36843775 37065721
468 D:\APP\ARCHIVELOG\ARC0000000468_0815512562.0001 37065721 37294978
469 D:\APP\ARCHIVELOG\ARC0000000469_0815512562.0001 37294978 37572830
470 D:\APP\ARCHIVELOG\ARC0000000470_0815512562.0001 37572830 37818186
471 D:\APP\ARCHIVELOG\ARC0000000471_0815512562.0001 37818186 38093499
472 D:\APP\ARCHIVELOG\ARC0000000472_0815512562.0001 38093499 38346397
473 D:\APP\ARCHIVELOG\ARC0000000473_0815512562.0001 38346397 38381157
很幸运,38391683大于473这个最大的archive log 的SCN,我不需archive log 的帮助。recover所需的信息在redo log 中。
例如:数据文件file_id为5的处于recover状态,执行
alter database recover datafile 5;
依次恢复状态为recover的数据文件。
再次查看online_status为offline状态,需要执行
Alter database datafile 5 online;
依次将处于offline的数据文件ONLINE。都online后数据库处于open状态了后,就可以用了。
如果数据库处于No Archive log 状态的时候,recover所需的信息只能从redo log 中获取,如果此时的redo log被overwrite了,将不能online数据文件,那只能想其他方法了。
Possible causes and solutions summary:
=====================================
A. Tablespace or Datafile offline.
B. Datafile does not exist at the OS level.
C. Datafile locked by Backup Software.
D. Incorrectly set ULIMIT on UNIX.
E. Rollback Segment with active transactions is unavailable
F. Possible Other Causes.
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