A computer implemented method, apparatus, and computer usable program code for managing a server cluster. The process identifies a plurality of average method call durations corresponding to calls to a plurality of methods associated with an application on the server cluster to form a plurality of identified average method call durations. The process groups the plurality of methods based on the plurality of identified average method call durations to form a plurality of grouped methods. Each method in the plurality of grouped methods is executed by a particular cluster member in the server cluster. The manner in which the plurality of grouped cluster members is grouped reduces a coefficient of variation on each cluster member in the server cluster. The process executes a method in a selected cluster member associated with the method in response to receiving a call for the method.