Effect of Service Disciplines on Waiting Time in M/M/(1,n) Systems
September 2003
Robert N. Will, The MITRE Corporation
ABSTRACT
Performance tuning often involves consideration of adding another server to the
system. Owing to changes in technology, the additional server may be of a service rate
different from that of the existing servers. Moreover, with heterogeneous servers,
consideration must be given to what service discipline should be employed. An analysis
is provided of the effect on waiting time using two service disciplines (1) weighted-priority
and (2) priority to the faster server. Examples of M/M/(1,1) and M/M/(1,2) systems are
used to illustrate the effects, and a discussion of the results is presented.
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