1. A computer implemented method of predicting resource utilization, said method comprising: determining a measure of requests of each of a plurality of request types in each of a plurality of workloads processed by a resource in a system; determining a level of utilization of the resource for each workload, the utilization due at least in part to the resource processing the requests; determining resource utilization as a function of the request types, the determining resource utilization as a function of the request types based on the level of utilization of the resource for each workload and the measure of requests of each of the request types in each workload; and predicting utilization of the resource for a particular number of requests of each of the request types, the predicting based on the resource utilization as a function of the request types.