Advancement in technology lead to the demand for computational power which in turns has led to the creation of large-scale data centers. They consume enormous amounts of electrical power resulting in high operational costs and carbon dioxide emissions. Moreover, modern Cloud computing environments have to provide high Quality of Service (QoS) for their customers resulting in the necessity to deal with power-performance trade-off. The authors will propose an efficient resource management policy for virtualized Cloud data centers. Proposed scheme consider the maximum and minimum utilization threshold value. If the utilization of CPU for a host falls below the minimum threshold, all VMs have to be migrated from this host and the host has to be switched off in order to eliminate idle power consumption.