Memory requirements, 3GB cache

Is any of you running squid on a 3GB or larger cache?
I'm currently performing an in-site conversion from a 3GB Spinner proxy
cache to a Squid proxy cache (on the same partition).

What happens if Squid has to swap? Are the access patterns
"civilized"? Or will it thrash badly?

Incidentally, are there any plans to move most of the Store Management
to disk, so that Squid becomes less of a memory hog for large caches
(he said, while he was contemplating expanding the proxy cache
to a 4 or 6 GB striped partition)?

-- 
Sincerely,                                                          srb@cuci.nl
           Stephen R. van den Berg (AKA BuGless).
"I have a *cunning* plan!"