The Web application performances criteria are studied which include resource occupied, response time, concurrency users and think time. Performance testing is a significant part of the testing for Web applications. Load testing can be used to confirm the performance requirements of the tested system and load growth in the future. It is also used to troubleshoot where the software exceptions happen. With the automatic testing software LoadRunner, an online learning system is tested. The performance of trans- actions, network and response time and other performance criteria are analyzed.