Re: rman compressed backup is much smaller but very slow

From: Tomi Wijanto <restomi_w_at_yahoo.com>
Date: Wed, 2 Aug 2006 03:09:01 -0700 (PDT)
Message-ID: <20060802100901.65866.qmail@web52005.mail.yahoo.com>

It's seem that your system is I/O bound. Smaller backup size result in faster time.

Mine seems to be CPU bound.

regards,
tomi

• "Radoulov, Dimitre" <cichomitiko_at_gmail.com> wrote:

> > Could someone shared their experieces on
> compressed
> > backup, especially with big sized database.
>
> Red Hat Enterprise Linux ES release 3 (Taroon Update
> 4)
> Oracle Database 10g Release 10.2.0.2.0 SE
>
> Not a big size database: 30GB (~18GB used), backed
> up on a NFS mounted drive (all filesystems are ext3
> type).
>
> full backup without compress: backup sets size
> ~13GB, elapsed 37min
> full backup with compress: backup set size < 2GB,
> elapsed 26min
>
> BACKUP OPTIMIZATION OFF
> PARALLELISM 1 (SE doesn't support parallelism > 1)
>
>
> Regards
> Dimitre

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Received on Wed Aug 02 2006 - 05:09:01 CDT