16gb of that is allocated to the minecraft VM alone, with the number of plugins and worlds i run on it, the ram usage does climb up there. not quite 16gb but i've been trying to see what the peak usage is so i can scale it back. the AD VM only has 1gb, same with the NOC VM. The web-server has 4gb allocated to it as i have it also render the game maps for minecraft and it can use the full 4gb. WHS011 has 2GB, never bothered to adjust it after installing.