[Zope] Zope capacity planning

[Ricardo Bánffy]

Hi folks.

I was giving a class on Zope/Plone administration and one of the
students asked about an "official" guide on Zope capacity planning. I
searched zope.org, asked all mighty Google and wandered through both
the darkest and lightest sites that say things about Zope with no
success.

Is there such a thing? Is there any reference these students can point
to when they say they need half-a-ton of servers to serve their
requests?