Re: Documentation for reasons to NOT use RAC?

From: Cary Millsap <>
Date: Wed, 19 May 2010 17:37:53 -0500
Message-ID: <>

Agreed with Greg. I like the way I've heard Tom Kyte phrase it, that RAC is a *scalability amplifier*, just like a real physical amplifier works with a singing voice. If your application scales poorly on a single Oracle instance, then it will scale abysmally on RAC. If it scales well on a single Oracle instance, then it will scale beautifully on RAC.

Cary Millsap
Method R Corporation

On Wed, May 19, 2010 at 5:07 PM, Greg Rahn <> wrote:

> I think this can easily be summed up as this:
> Scalable applications/designs scale with Oracle RAC. Non-scalable ones do
> not.
> Or to put this in a different light:
> If an application does not scale on Oracle RAC then it's likely that
> it's not scaling as well as it could/should on just a single Oracle
> instance.
> On Wed, May 19, 2010 at 12:51 AM, Martin Bach
> <> wrote:
> > I also disagree with the statement that developers don't need to
> > know RAC-sure, we no longer use block pinging but hey, it's a cluster
> > and that requires some specific knowledge _about_ clustering and its
> > specific needs.
> --
> Regards,
> Greg Rahn
> --

Received on Wed May 19 2010 - 17:37:53 CDT

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