Utilization is the percentage of time that a resource is used when compared with the total time that the resource is available for use. For example, if a CPU is busy processing transactions for 45 seconds out of a one-minute timespan, the utilization for that interval is 75%. Resources such as CPU, memory, and disk should be measured for utilization in order to obtain a complete picture of an application's performance. As utilization approaches the maximum throughput, response times will rise.