Secondly my media server is a seperate box which is attached with the
library. This oracle client is a seperate box

On 10/4/06, veritas-bu-request at mailman.eng.auburn.edu
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>    1. Re: rman backups are slow (Joe Royer)
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> ---------- Forwarded message ----------
> From: Joe Royer <jroyer at digitalmotorworks.com>
> To: veritas-bu at mailman.eng.auburn.edu
> Date: Wed, 4 Oct 2006 11:14:19 -0500 (CDT)
> Subject: Re: [Veritas-bu] rman backups are slow
> Is the oracle server also a media server?  If not, I have seen this due to
> Solaris network drivers.  Although it is odd that your OS backups run at
> 100MB/s, I never saw that.  Backing up Solaris across a gigabit network I
> was never able to exceed 60 MB/s whether it was Oracle or OS data.
>
> I confirmed the bottleneck was solaris by using netcat.  I saw this on
> Solaris 8 and 9 on sparc hardware with both ce and ge interfaces.  The ce
> interfaces are about 10MB/s faster, but not more than 60 MB/s total.
>
> I'm told Solaris 10 on x86 does not have this problem but I have not tried
> it.
>
> If your Oracle server is a media server, my only guess is internal RMAN
> throttling.  I'm not a DBA, I don't know how to check for this and I don't
> see it in the RMAN Pocket Reference, so check with your DBA.
>
>
> ----Original message----
> Date: Wed, 4 Oct 2006 09:15:05 +0500
> From: "Atif Munir" <atif76 at gmail.com>
>
> I am using netbackup 5.1 with rman for my oracle database backups.OS is
> Solaris 9 with oracle 9.2.0.7 and I am unable to get a speed more than
> 50MB/sec. For FS backup this speed is 100MB/sec but for rman I get
> stucked at 50MB/sec. I don't know why I am unable to get more speed.
>
> The library is L100 and I am using two drives for backup. By increasing
> number of drives or number of channels the backup speed is not going to
> be better.
>
>
> The tunning I have made so far is.
>
>
> NET_BUFFER_SZ as 262144
> NUMBER_DATA_BUFFERS=64
> SIZE_DATA_BUFFERS=1048576
>
>
> --
> Joe Royer / SysAdmin / Digital Motorworks / 512-692-1028
>
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