A data-processing system is described comprising: • A plurality of data-processing devices (11, 12, 13, 14) • A data-handling facility (20) shared by the data-processing devices, • An aggregation facility (30) for receiving signals (R1, R2, R3, R4) indicative for individual requirements from the data-processing devices for a performance of the shared data-handling facility and for providing a control signal (RA) indicative for a required activity level to meet the aggregated requirements, • a control device (40) for controlling an activity level of the data-handling facility depending on the control signal (RA). Additionally a data-processing method is described.