Re: CPU speed comparison

Hi,

Thank you Mark and Tanel for the inputs.

Best Regards

Sriram Kumar


On 12/23/05, Mark Brinsmead <mark.brinsmead@xxxxxxx> wrote:
>
> You need to consider *much* more than just CPU speed.  Cache size, system
> (mainboard) architecture,
> and dozens of other factors and components also matter.
>
> That said, you can probably find the numbers you need for *rough*
> comparisons at
> http://www.spec.org.
>
> I presume you'll be interested in multi-processor systems -- so you'll
> probably want to look at
> SPECrate benchmarks.
>
>
> Sriram Kumar wrote:
>
> Hi Gurus,
>
>
> Firstly Wish you all Merry Christmas.
>
>    We have a banking application and I am in the process of  doing a CPU
> Capacity prediction of the DB server based on the Ratio Modelling Technique.
> I have arrived at the CPU requirements for particular platform(Say Itanium2)
> and now I want to arrive at the CPU numbers for the other Server
> platforms(PA-RISC, IBM PowerV/VI, Intel Xeon, Ultrasparc IV/III).
>
> Say for a given volume set I arrive at a 2 CPU Itanium2, Now how do I
> arrive at CPU numbers for the other platforms. Any inputs/pointers would
> very much be appriciated.
>
> I looked at 
> http://home.comcast.net/~arivenes/sql/cpu_test.sql<http://home.comcast.net/%7Earivenes/sql/cpu_test.sql>
>  and
> feel that we can use this script for the said comparison provided the
> underying assumption is correct. The scripts basic assumption is using LIO's
> to determine the CPU usage . Run this script in various platforms and  use
> the CPU usage figure across platforms to arrive at the comparitive numbers.
> Does this approach sound logical?
>
> In this effect, I remembered rading Cary's papaer "Why You Should Focus on
> LIOs Instead of PIOs" and I found the following comment from the author
>
> <Quote>
> The actual *use *of Oracle block content is the number one consumer of CPU
> capacity on any reasonably well optimized Oracle system. Your average LIO
> latency will vary, depending primarily upon your CPU speed and the total
> number of machine instructions required to parse the content of an Oracle
> block
> <Unquote>
>
> Thanks and Regards
>
> Sriram Kumar
>
>
>
>

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