RE: Number of CPUs vs. Speed of CPUs

One point that I haven't seen brought up yet is the diminishing returns you get with multiple CPUs, especially Intel. Doubling your CPUs won't give you 100% more CPU power. Going from 1 to 2 CPUs, you can expect better than 90% scalability (probably 95%), but after that the curve drops.

What a crock! You get charged twice as much for licensing when you can only reach a *theoretical* 90-95%. And according to one Sun whitepaper (http://www.sun.com/software/white-papers/wp-dhbrown99/), WinNT will give you just 35% linearity. At double the licensing price. Granted, the paper is a few years old now...

<sigh>

Rich Jesse                           System/Database Administrator
Rich.Jesse_at_qtiworld.com              Quad/Tech International, Sussex, WI USA

> -----Original Message-----
> We are in the process of sizing a new server for multiple Oracle
> instances. What factors are useful as input in determining
> how many CPUs
> and the relative speed of them? For example, do we want fewer, faster
> CPUs or do we want more, slower CPUs? Are there any good
> guidelines to
> determine what the number of CPUs should be?
>
> Thanks in advance -
> Lisa

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Author: Jesse, Rich
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