The objective of this study is to propose user control system that definitely increases the performance of realtime data service. However the most existing work on this RTDB was based on very critical closed loop control system. To overcome this problem we design a system called user control database model which stimulate the overload transaction during run time. We also design quality of service scheme and it allows to setting requirements for QOS transaction. The performance of proposed algorithm evaluated in different experiments. So the proposed system will definitely satisfies our needs even critical conditions like overload or run-time errors.