1. A method comprising: receiving, by a workload evaluator, a representative workload that comprises a plurality of competing demands for capacity of at least one shared resource; evaluating, by the workload evaluator, the representative workload to determine at least one characteristic of the representative workload; determining, based at least in part on the at least one characteristic of the workload, an impact of the representative workload on performance of a workload manager in managing access of the representative workload to the capacity of the at least one shared resource.