It appears to be stating that going to multiple processors within one
server doesn't offer advantage over just installing multiple single
processor servers. There is a cost in overhead for the OS functions
which share workload.

But, I don't know what the "major software issues" would be that would
make running 12 single processor servers as attractive as running one 12
processor server.

Richard B Baird wrote:

>Thanks for the post.  Would anyone like to discuss the meaning of the
>following paragraph of the article?  Why would this be true?  are they
>saying that a 12 way wouldn't be a significant increase in power when
>running websphere?   what are the "major software issues" that would bog
>them down?
>The issue of maxing out on capacity was faced early on. Passer said
>stress tests were performed at the IBM iSeries headquarters, in
>Rochester, Minnesota. From that, it was determined that adding a
>second processor would be "an easy fix." The next round of increasing
>capacity is more complicated. "After two CPUs in the iSeries," Passer
>explained, "the application server has too much overhead and doesn't
>really offer a big advantage over multiple application server
>instances. In all cases, it means more CPUs, but there are major
>software issues one gets bogged down with."
Chris Rehm

Beloved, let us love one another: for love is of God; and every one
that loveth is born of God, and knoweth God. 1 John 4:7

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