I've had the best luck with an opcode cache, like eAccelerator.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: "Hummel, Tracey S - (thummel)"
I have a d7 site that has only authenticated traffic and but a ton of it. It needs the a performance boost.

Does Boost only work well for anonymous users? Would Memcache and Varnish be a good solution for an authenticated traffic only site?