Performance modeling of a computer system Saudi Arabian Ministry of Interior online system.

Abstract

The main objective of this thesis is to establish a modeling methodology that enables the development of a computer simulation model of the SAMIS online system. The modeled system is operated by the National Information Center (NIC) Riyadh. This thesis work is part of project supported by NIC and has been initiated due to the unsatisfactory performance of the system. A core model has been constructed, and the suggested modeling methodology has been utilized to construct a model of one of the SAMIS online system Application Subsystems. The combined model has been tested under different configurations, and its behavior has been documented. The observed behavior of the model enables the construction of performance trends leading to a better understanding of the reaction of the SAMIS system under different situations. The main observation of this study was the over and under utilization of different hardware components of the SAMIS Online System, resulting in bottlenecks that affected the performance of the system as a whole.