Managing workload in a computing environment, in one aspect, may include monitoring an execution behavior of a portion of a job executing on the external computing resources. The execution behavior of the portion of the job executing on the external computing resources may be compared to the behavior required to attain at least one performance objective. If the comparison indicates that a performance objective is not being met, whether allocating additional internal resources would improve the overall performance as compared to the objective may be determined. If the determination indicates that allocating additional internal resources would improve the overall performance, at least one additional resource may be allocated.