This paper applies the feedback error learning and Hoo framework to develop a robust model and adaptive architecture for web server performance control and service delay guarantees. Web server model is approximated with a two tank system that includes many uncertainly components. In contrast with web server delay control delay, our architecture based on Hoo robust control and queuing model predictor enforce server utilization and delay guarantees for different classes on virtual servers. A simulation evaluation demonstrates that Hoo robust control can provide robust request utilization and request response time for internet servers.