I'm not sure if I understand your question completely...

... but I once had a problem with a giant hash constantly swapping and solved it by splitting up the hash into a two tier HoH.

If you can organize the upper tier roughly according to the timeline of your process, your system will only swap the necessary lower hashes on demand.

I already described this here, will update the link after I found it.

HTH! :)

update

see Re: Small Hash a Gateway to Large Hash?