ENTERPRISE JAVABEAN RESPONSE TIME ANALYSIS

Abstract

This paper presents two methods for analyzing the response time of method calls of Enterprise JavaBeans (EJB). The first method breaks response time measured by a single client into two sets of parameters: one set relating to the beans themselves, and the other set characterizing the EJB run time environment including the EJB container, the underlined persistent store, and the remote method calling overhead. A system of linear equations can be used to solve for the values of the parameters. The second method involves measuring the response time of EJB method calls under different workload intensities and estimating the CPU and disk demands of a method call. As examples, the response time of method calls of several primitive EJBs deployed on an EJB server is measured and analyzed. The two methods are useful in understanding how much time is spent in the major components of the EJB run time environment and in estimating the resource demands of EJB method calls for further developing capacity planning models.