Thread:Project:Support desk/ Novice Caching Advice Needed!/reply

memcache and filecache are separate things (memcache more caches for logged in users, filecache/varnish/squid is more for logged out users). On high performance system, using varnish or squid usually takes the place of file cache.

Make sure that your memcached server has enough caching space on it. Consider implementing profiling to see what is taking the most time, and what your cache hit ratio is (if its too low it could mean something is wrong with your setup)