I find Arma a intresting and deaply involved war sim. However It is a memory and resource hog and this goes double for a sever.
I find the lack of Dual core and or dual cpu's a big problem. I am currently running two aram servers and they are both Hogging CPU and memory. The dedicated server has to be restarted every 24 hours to clear up what is a big memory leak.
I am running a dual cpu server with two dualcore xeon's 3.0,s and 4 gig of ram and the load on the server is too much.