Thanks, I never even thought about looking to cache it in RAM. It would be interesting to look into (and a first for me).

Basically, I am caching results of search queries. Once the person sees page 1, it can be cached because it won't change so quickly. The first visit to page 2 of course will have to be dynamic, but then can be cached, etc... so if they navigat backwards it should be from cache.

People do navigate back quite often as this requires a fair amount of browsing and comparing between pages.