Diagnosing ORA-01555: what table had the unreconstructable block?

We have some very long-running batch processes (i.e. > 20 hours for a single INSERT statement) and we sometimes get ORA-01555 (snapshot too old) failures. Our undo_retention is 10800 seconds=3 hours.
We have discussed (with the development team) the combination of events that are needed for this situation to arise. They are unable to think of a situation where any of the tables (in today's incident, there are 7 of them) would have been updated after this job started.
Is there a method for analyzing the trace file to determine which table had the block that could not be reconstructed due to overwritten UNDO? This might give us ideas for how to avoid this via operational changes (i.e. changing the job schedule).
Of course, we are also pursuing tuning efforts for this query.
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
PL/SQL Release 10.2.0.5.0 - Production
CORE 10.2.0.5.0 Production
TNS for Solaris: Version 10.2.0.5.0 - Production
NLSRTL Version 10.2.0.5.0 - Production
Thanks,
Mike

Well you could still check to see if there are any uncommitted transactions for those tables:
Query the DBA_DML_LOCKS view (and/or DDL view)
http://docs.oracle.com/cd/E11882_01/server.112/e25513/statviews_3157.htm
select * from DBA_DML_LOCKS
SESSION_ID,OWNER,NAME,MODE_HELD,MODE_REQUESTED,LAST_CONVERT,BLOCKING_OTHERS
10,SCOTT,EMP_READ_ONLY,Row-X (SX),None,1163,Not Blocking
69,SCOTT,EMP_READ_ONLY,Row-X (SX),None,1648,Not Blocking
That shows that two session are holding exclusive row lock on the EMP_READ_ONLY TABLE. As a test I inserted a row from two different sessions but did NOT commit it yet.
The DDL version of the view can be used in addition.
See my reply Sep 4, 2013 12:23 AM in this thread from yesterday for more info.
https://forums.oracle.com/message/11174417#11174417
At least in 10g you can tell before you start if there are any issues to resolve. If there are no issues then once you start your query there won't be any issues that could cause the snapshot problem since your query will be first in line.

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ORA-27047: unable to read the header block of file

My Windows 2003 crashed which was running Oracle XE.
I installed Oracle XE on Windows XP on another machine.
I coped my D:\oracle\XE10g\oradata folder of Win2003 to the same location in WinXP machine.
When I start the database in WinXP using SQLPLUS i get the following message
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ORACLE instance started.
Total System Global Area 146800640 bytes
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Variable Size 62918580 bytes
Database Buffers 79691776 bytes
Redo Buffers 2904064 bytes
ORA-00205: error in identifying control file, check alert log for more info
I my D:\oracle\XE10g\app\oracle\admin\XE\bdump\alert_xe I found following errors
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Wed Apr 25 18:38:36 2007
ALTER DATABASE MOUNT
Wed Apr 25 18:38:36 2007
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ORA-27047: unable to read the header block of file
OSD-04001: invalid logical block size (OS 2800189884)
Wed Apr 25 18:38:36 2007
ORA-205 signalled during: ALTER DATABASE MOUNT...
ORA-00202: control file: 'D:\ORACLE\XE10G\ORADATA\XE\CONTROL.DBF'
ORA-27047: unable to read the header block of file
OSD-04001: invalid logical block size (OS 2800189884)
Please help.
Regards,
Zulqarnain

Try to install win 2003 server software, do the fresh installation of oracle software, now copy the datafiles and controlfiles to same locations as you did on winxp.
get back to us, if still not out of the woods. I still doubt that a simple restore would do the trick, since you doing it across different platforms, might be I can be wrong, but this is what I personally feel, you not able to start the database on winxp.
hare krishna
Alok

ORA-27044: unable to write the header block of file / IBM AIX RISC System/6

We are getting an error like this...
Oracle 11.2.0.2
AIX 5.3
Error:
CREATE CONTROLFILE REUSE DATABASE "CLMST" RESETLOGS NOARCHIVELOG
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-00200: control file could not be created
ORA-00202: control file: '/clmst02/UAT/oradata/control/control01.ctl'
ORA-27044: unable to write the header block of file
IBM AIX RISC System/6000 Error: 89: Invalid file system control data detected
Additional information: 3
Additional information: -1
Additional information: 1

ORA-09817 IBM AIX RISC System/6000 Error: 89
Oracle 11.2.0.2
AIX 5.3
Related Errors:-
Mon Nov 05 18:33:51 2012
ARC3 started with pid=30, OS id=954622
ARC1: Becoming the 'no FAL' ARCH
ARC1: Becoming the 'no SRL' ARCH
ARC2: Becoming the heartbeat ARCH
Errors in file /clmst01/UAT/oracode/app/oracle/diag/rdbms/clmst/clmst/trace/clmst_ora_2514960.trc (incident=17053):
ORA-00600: internal error code, arguments: [kccugg_end], [], [], [], [], [], [], [], [], [], [], []
Errors in file /clmst01/UAT/oracode/app/oracle/diag/rdbms/clmst/clmst/trace/clmst_m000_2105586.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/clmst02/UAT/oradata/redo/redo03A.log'
ORA-27037: unable to obtain file status
IBM AIX RISC System/6000 Error: 2: No such file or directory
CREATE CONTROLFILE REUSE DATABASE "CLMST" RESETLOGS NOARCHIVELOG
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-00200: control file could not be created
ORA-00202: control file: '/clmst02/UAT/oradata/control/control01.ctl'
ORA-27044: unable to write the header block of file
IBM AIX RISC System/6000 Error: 89: Invalid file system control data detected
Additional information: 3
Additional information: -1
Additional information: 1
Cause:-
Your /clmst02/ mount point might be corrupted.
Check:-
fsck /clmst02
The current volume is: /dev/fslv00
File system is currently mounted.
Primary superblock is valid.
fsck: Performing read-only processing does not produce dependable results.
*** Phase 1 - Initial inode scan
*** Phase 2 - Process remaining directories
*** Phase 3 - Process remaining files
*** Phase 4 - Check inode allocation map
File system inode map is corrupt (NOT FIXED)
fsck: 0507-278 Cannot continue.
File system is currently mounted.
fsck: Performing read-only processing does not produce dependable results.
Fix:-
Either you can change the file location to another mount points or shutdown the database and run the fsck on /clmst02 mount point to fix the corrupted one & start the database.
Fix:-
Recreate the affected Redolog files
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'/clmst02/UAT/oradata/redo/redo03A.log',
'/clmst03/UAT/oradata2/redo/redo03B.log',
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Message was edited by: Lanka Murthy

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Blog: http://blog.cmaresch.at/ Twitter:
LinkedIn:
XING:
Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

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Diagnosing ORA-01555: what table had the unreconstructable block?

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