On Web Server Performance Modeling for Accurate Simulation of End User Response Time

We propose a web server performance modeling method and a parameter setting method that complement the “Tune protocols and parameters” section of SMARTE methodology. The modeling method adapts service-time calculations in a gna_clsvr_mgr.pr.m depending on whether the contents are static objects (text, gif, or jpg) or dynamic objects (cgi, asp, etc.). To simulate end user response time accurately, the parameter setting method is based on the results of stress tests on an actual server. Through some examples, we found that the simulated HTTP basic response time (38.072 ms) agreed closely with the measured one (38.912 ms), and the performance degradation, too. They show the effectiveness of these proposed methods.