A computer system includes servers having virtual machines arranged therein; a noise source in each among the servers, the noise source emitting sound when the server is operated; and a controller that controls arrangement of the virtual machines in the servers. The controller solves an integer programming problem having an objective function representing a noise contribution described as any one among a function of virtual machine arrangement and a function of a job assignment count and indicating an extent of contribution of the sound emitted from the noise source to a noise volume at an evaluation point, by executing software for solving the integer programming problem on a processor, and based on a solution to the integer programming problem, causes the processor to arrange the virtual machines in the servers via an interface for the servers.