peak to 5% cpu! (Score 1)

We don't run a tomcat/cocoon solution exactly, but we borrowed many of the ideas from cocoon and developed our own MVC framework for tomcat (servlet 2.3) which uses a combination of xslt and xml for our website. We serve over 1 million pages a month on a pair of p2/800 machines. Neither machine peaks 5% cpu load on an average day! Now that's performance!

To see this in action take a look at: Point2 UsedIron