According to embodiments of the disclosure, methods, systems, and computer program products are disclosed. A computer implemented method of allocating resources in a job scheduling system may include segmenting a workload plan into one or more time slots, determining, prior to each time slot, a job forecast for the time slot, the job forecast based on historical job data, and modifying the resource pool to bring a resource pool parameter within a resource range in response to determining that the job forecast exceeds a job deadline. The workload plan may have one or more jobs for a resource pool, the one or more jobs may be scheduled in at least one of the time slots. The resource pool may have one or more resources.