A computer obtains a load value relating to a detection process from each of a plurality of server devices that execute, in units of pieces of identification information, the detection process of a pattern of data distributed by a transfer device that distributes input data in accordance with identification information. When a load value obtained from a first server device among the plurality of server devices exceeds a specified allowable range, the computer executes a process for moving, in units of combinations, a combination of identification information and one pattern corresponding to the identification information from the first server device to a second server device among the plurality of server devices depending on whether load values of the first server device and the second server device respectively fall within the allowable range.