I use an Buffalo Linkstation Pro V2 with freelink (hacked firmware) it runs with debian 4.0 . My network ist based on 100mbit/sec
Yeah, that's a large list for such a memory-starved device. Probably swapping up a storm. Particularly if you have lots of playlists. There is a really ugly join that has to happen to build playlists.
I'm refactoring the db stuff right now. I expect in a week or so, I'll have in-memory playlists. that might work better, if you are following nightlies.