PCS (Performance Control System) is available as a performance control subsystem for regulating loads; it is based on PRIOR and provides the following functions:
Improved preferential treatment of load components thanks to targeted SERVICE allocation; the SERVICE of a server is determined from the time the CPU and main memory (MEMORY) are reserved and from the number of I/O operations (IO).
Increased transparency with regard to the distribution of system capacity over the various categories
Dynamic adjustment of the service allocation to categories or tasks in accordance with fluctuations in load
Throughput control by monitoring the capacity consumption in the categories
Differentiation between “short-running jobs” and “long-running jobs” and thus improved control possibilities via automatic category changeover
Improvement of the response time by means of the preferential treatment of short-running jobs.
Differentiation in the control of a number of TP applications through allocation to several categories
PCS operation can be controlled by means of global system parameters and/or category-specific parameters: