The paper investigates performance parameters of an application server handling different types of jobs prioritized and non-prioritized. Busy state handles the prioritized jobs which are processed using N-policy. When there are no prioritized jobs the server goes in working vacation state where it handles non prioritized jobs. These jobs can also encounter server breakdown. A two phase repair system is considered for the server when it breaks down in the busy state. The system is modeled as an M/M/1 queue and the matrix geometric method is used for computing the steady state probabilities of various states of the server. Performance measures like throughput, delay, expected number of customers in the different states are computed and illustrated numerically.
Application server, Matrix geometric method, Breakdown, Repair, N-policy, Working Vacation
