Things to note : Queuing Theory basics
1. The utilization of a service center is dependent on the Arrival rate.
2. The Service Demand remains constant irrespective of the load (for Load Independent devices).
3. Throughput increases with the Utilization.
4. Queues will be formed even when the utilization is less than 100% & its also possible that there can be no queues during 100% utilization too. Hence there is no relationship between the Utilization & Queue length.
5.The response time does not depend on the Utilization. It depends on the Queue length, hence the arrival pattern.
6. The maximum CPU utilization that can be achieved can be calculated using the formula Queue length / Queue Length + 1.
(i.e) For a four CPU m/c maximum utilization that can be achieved = 4/5 = 80%
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