1. A computer-implemented method for managing resources of a computer infrastructure services provider, comprising: determining, by a management server computer, that a condition has occurred related to operation of a data center; determining, by the management server computer in response to the determined condition, at least one resource of a plurality of resources of the data center to terminate or shut down, wherein the determining of the at least one resource includes selecting the at least one resource from a first subset of the plurality of resources that are being used for excess program capacity users based at least in part on priority data indicating that the excess program capacity users have a lower priority than other users that are not excess program capacity users, and wherein a second subset of the plurality of resources are being used for the other users; and terminating or shutting down, by the management server computer, the determined at least one resources.