Re: measuring the extra CPU needed

From: Orlando L <oralrnr_at_gmail.com>
Date: Sat, 26 Jul 2014 00:24:23 -0500
Message-ID: <CAL8Ae74+f67PGruducPC70cDrgMU2+STWFgdsG3TtZAFyr=FLQ_at_mail.gmail.com>

Thank you John. I thought there would be some way to measure and predict the growth based on the existing load with capacity planning techniques. I thought this would be a good opportunity for me to start learning about them. But i guess I can do a linear projection based on the increased volume.

On Tue, Jul 22, 2014 at 5:22 AM, John Hallas <John.Hallas_at_morrisonsplc.co.uk
> wrote:

> As you are already planning to increase CPU capacity that implies that
> you have already done the analysis that identifies what you are short of.
>
>
>
> TBH I am guessing that most people do not do exact measurements as,
> unless you can replicate the exact volume, data and way it is used it will
> be difficult to do that. Therefore a simple theory might be – we have 4
> CPUS and are hitting limits regularly for significant periods of time
> (significant is very application specific here – it may be seconds or an
> hour depending on the importance of the system and the impact it has).
>
>
>
> So my example we might think we need 6 CPU to maintain current and we know
> that growth will increase by 25% so that looks like 8 to me – as most sites
> I have been at seem to always use even numbers of CPUs.
>
>
>
> John
>
>
>
>
>
>
>
> *To:* oracle-l_at_freelists.org
>
> *Subject:* measuring the extra CPU needed
>
>
>
> All,
>
>
>
> We have an existing system on 10.2 on AIX. We are planning to increase the
> CPU capacity because we seem to be hitting the limits there and also a
> merger. We will be adding more population to this application due to the
> merger, about 25% more. Assuming that the applications are tuned enough,
> how do I go about measuring the increased CPU load needed for this new
> population.
>
>
>

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Received on Sat Jul 26 2014 - 07:24:23 CEST