RMan is missing some files when deleting obsolete archivelogs

Hi all

in one of our databases 9iR2, I noticed a rather strange behavior of the RMan delete obsolete archivelogs. The RMan script has the "OBSOLETE RECOVERY WINDOW DELETE 7 DAYS DEVICE TYPE DISK"-command. If RMan deletes the archivelogs regularly. But unfortunately, in every race, it leaves 3 files cancelled. The log file is (only relevant lines):

Remove the following obsolete backups and copies:
Making key time filename/handle type
---- ----
Archive 24779 08 - SEVEN journal.-10 /oralogs/oraArchive/VG41MED/VG41MED_12402.ora
Archive Log 24780 08-SEVEN.-10 /oralogs/oraArchive/VG41MED/VG41MED_12403.ora
...
Archive 24785 08 - SEVEN journal.-10 /oralogs/oraArchive/VG41MED/VG41MED_12408.ora

on the next race (the next day) the log file says:

Remove the following obsolete backups and copies:
Making key time filename/handle type
---- ----
Archive Log 24799 09-SEPT.-10 /oralogs/oraArchive/VG41MED/VG41MED_12412.ora
Archive 24800 09 - SEVEN journal.-10 /oralogs/oraArchive/VG41MED/VG41MED_12413.ora
...
Archive Log 24805 09-SEPT.-10 /oralogs/oraArchive/VG41MED/VG41MED_12418.ora

As you can see, RMan lack VG41MED12409.ora log file, VG41MED12410.ora, and VG41MED_12411.ora that are available before and after the backup procedure. We treat archivelogs on operating system level. A "overlap archivelog all ' - command does not list these 3 files, if the database thinks that they are removed - which is not really true. This odd pattern is repeated every day, so my archivelog directory is growing everyday with the 3 files not deleted.

This behavior appears still more strange, because the RMan backup script even run on 3 other databases with same structure does not show this "error". I checked the configuration of 4 databases and not detected no difference.

Maybe it's a corrupt controlfile (we do not catalog-db). Someone has any idea how to solve this problem?

Thank you
Friedhelm

Edited by: user8964905 the 20.09.2010 00:18

Hello
(1) I think the command of OVERLAP is the only way to know what archivelogs are always specific to the database (expired or available) kn.
(2) thank you for your explanations. You're right - the order REPORT OBSOLETE list backups, but my problem are the obsolete archivelogs of backups. If my humble opinion REPORT OBSOLETE wouldn't help.

In fact no and no :).

(1) a simple

list archivelog all;

lists the known archivelog (expired or available) files.

crosscheck archivelog all;

will check if the information on their availability is still topical, but it will not help you in this case (they exist!)

2.

report obsolete recovery...;

http://download.Oracle.com/docs/CD/B10501_01/server.920/a96566/rcmconc3.htm#463220
Order REPORT displays OBSOLETE backups and copies of data files, control files, and archived redo logs that can be deleted because they are no longer needed.
...
OK, but if you read a little more of the documentation:
...
In addition to backups of file obsolete data, RMAN reports obsolete archived newspapers and archived backups of logs. When backups of files of data from one point in time are obsolete, then archived logs that can apply to these data files are also is no longer necessary and become obsolete according to the specified retention policy.

---------------------------------------------------------------------------------------------------------------------------

I have increased the CONTROLFILE_RECORD_KEEP_TIME now and watch the results next night. Perhaps the reason for this behavior is the fact that this database is very small compared to other databases, which do not show the effect.
I'll post the result of this strategy, here the next few days.
Wait & see

Best regards
Phil

Tags: Database

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