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Files being deleted in the flash recovery area, messages in the alert log Deleted Oracle managed file filename (Doc ID 1369341.1)

Last updated on MAY 21, 2020

Applies to:

Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 11.2.0.2.0 and later
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
For the purposes of this document, the following fictitious environment is used as an example to describe the procedure:
Primary Database: MYDB
Disk Group: +FRA

Symptoms

NOTE: In the images and/or the document content below, the user information and environment data used represents fictitious data from the Oracle sample schema(s), Public Documentation delivered with an Oracle database product or other training material. Any similarity to actual environments, actual persons, living or dead, is purely coincidental and not intended in any manner.

For the purposes of this document, the following fictitious environment is used as an example to describe the procedure:
Primary Database: MYDB
Disk Group: +FRA

Seeing messages like this in the alert log showing files being deleted from the flash recovery area (FRA) and wondering what is happening?

2011-09-30 10:03:43.574000 -05:00
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11747.266.763204175
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11751.462.763204177
2011-09-30 10:03:45.876000 -05:00
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11739.782.763204163
2011-09-30 10:03:47.034000 -05:00
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11734.748.763204167
2011-09-30 10:05:09.361000 -05:00
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11735.469.763204169
2011-09-30 10:05:51.057000 -05:00
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11755.592.763204153
Deleted Oracle managed file +FRA/mydb/archivelog/2011_09_30/thread_1_seq_11753.627.763204159


They cannot understand why this was done. Space pressure?
There was 20% free in the FRA before, during, and after we restored the logs.
Why was Oracle automatically deleting these archivelogs that we needed?
The db_recovery_file_dest_size is correct and matches the disk group size perfectly.

 

Changes

They had restored some archivelogs that had been deleted, as a the Goldengate product needed them.
After restoring the archivelogs they needed, they  noticed that the +FRA diskgroup was still at 20% free.

All of the requested logs were now on disk again.  Later, though, when trying to access some of the
very same restored archivelogs, they found they had been mysteriously deleted.


Cause

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In this Document
Symptoms
Changes
Cause
Solution


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