A method for operating a hydraulic system of an automatic transmission, in particular a dual clutch transmission of a vehicle, includes analyzing by a provisioning module of a control device of the automatic transmission whether an intention of a driver to initiate operation of the vehicle exists, wherein the automatic transmission includes a high-pressure circuit which includes a pressure accumulator, at least one clutch, actuators and a charge pump, and when the intention to initiate operation of the vehicle and a requirement to charge the pressure accumulator exist, activating a partial charging operation in which the charge pump is controlled with a charging rotational speed for increasing an actual accumulator pressure of the accumulator to a predetermined switch-off pressure value at which the automatic transmission is ready for operation for a defined period of time.