This explains why the lag has been getting worse the last few days
I have been getting more unexplained disconnects lately too (Why can't the clients tell me why i was disconnected (time out, protocol, server command, etc.)
I think its pretty obvious the server is paging itself to death. It appears that program code or data relevant to my session is very frequently being swapped to the disk in a second or less. If I make my next click in 1/2 second I can usually not get another lag for that click. Constant paging 24/7 would certainly look like an I/O bottleneck and constitutes severe endurance testing for the hard drive. Maybe a hard drive manufacturer would pay you to test their products?
Jorb and Loftar, please keep trying to keep this game running and thanks for the info.