Mortal Online 2 Server performence (500 Players on the Battlefield)

Before the server restart the Players in this area suffered
from lags. Players teleported arround and I got thrown
on the "login screen" The developers said this was due to a
bug that caused the monsters and animals' spawns to
quadruple as the other servers provide processing power. The
server was then restarted and some settings were changed. After that it worked and I think it's a brilliant achievement, considering that it's an MMO with hit boxes and a mount and blade combat system. That
impressed me.