Ok, heres an example of a master:

Were all talking about how to optimize our lucene queries and cache intelligently and so on, because the memory overhead is getting big (mind you were practically replacing our database with lucene).

After about 30 minutes of hypotheticals and complexity, this one guy (previously sitting there listening) just says "Why not run java 64 bit and set the max memory to 20 gigs or whatever is appropriate, let the operating system page for you". KARATE CHOP! I think if we could, we would re-create the scene from "The Mask" where his mouth just drops to the table.