Hybrid and Predictive Admission Strategies to Improve the Performance of an Overloaded Web Server

web servers, overloaded conditions, admission control strategy, performance analysis, optimization, SBAC In this paper, we use a session-based workload to measure a web server's performance. We define a session as a sequence of client requests. An overloaded web server can experience a severe loss of throughput when measured as the number of completed sessions. Moreover, the overloaded web server discriminates against longer sessions. This could significantly impact sales and profitability of commercial web sites because longer sessions are typically the ones that would result in purchases.