The system management apparatus, system, and network management system

A first calculation unit (130) for each combination of physical machines calculate a distance the size of the network load during a communication with other physical machines plurality of physical machines. Acquisition unit (121) acquires information indicating a new virtual machine running the license is permitted to communicate information to communicate with the virtual machine from a plurality of physical machines in a physical machine which is already running. Second calculation unit (140) based on the network distance and the communication permission information, for each of the plurality of physical machine physical computing machine represented by a plurality of physical machines in a physical machine in the case that the new virtual machine is running, having been permission to communicate with the new virtual machine virtual machine network overhead size of the load caused by communication network system. Decision unit (122) using the calculated network cost, decided to make a new virtual machine which is run by a plurality of physical machines in a physical machine.