Window 2 day using FRA more than expected recovery.

Hello, can someone please help me understand why my 2 day recovery window uses a lot more space FRA than I expected.

Here is some basic information.

Oracle 11g R2

Windows 2008R2

The database size = 16.77 GB

I have my FRA

Newspaper archives = 10.5 GB (approximately 2-3GBs daily)

Backupset = 1.63 GB (500MB per day)

Control file = 16.3 MB

Copy of image DB 13.7 GB

Journal online = 30MB

I use the Oracle out of the box back up strategy

Run {}

allocate channels oem_disk_backup device type of disk.

retrieve the copy of the database with the tag "ORA_OEM_LEVEL_0".

extra strength 1 cumulative backup copies = 1 to retrieve the copy with the tag database 'ORA_OEM_LEVEL_0 ';

}

FRA my height is 60 GB.

I do not perform backups on tape (which RMAN knows)

Everything is on disk.

I expect at some point that Oracle will review files outside of my window of recovery to be recoverable, but I am struggling to figure out when.

Now, if I put a window of recovery of 1 day (it's the current setting). It builds up to about 23 GB then it will start to have recoverable files. If I put a 2 day recovery window, it will consume all of 60GB and ends up falling. Why a 2 day recovery window is to consume as much space (more than double)?

I know that everything is on the disk and maybe that's my problem. In my scenario when oracle would consider to be recoverable files?

I thank very you much for your time.

Hello again;

on "oracle considers the files to be recovered.

The only answer I have ever seen on this is when "Oracle feels the pressure of space", rather vague.

Be careful when you use the window of recovery that you put it high enough to cover yourself.

Worth the trip:

Hemant Oracle DBA blog: understand the Obsolescence of RMAN backups

Best regards

mseberg

Tags: Database

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