Open, Closed, and Mixed Networks of Queues with Different Classes of Customers
Journal of the ACM (JACM)
IEEE Transactions on Software Engineering
Two-Level Iterative Queuing Modeling of Software Contention
MASCOTS '02 Proceedings of the 10th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems
Queueing Networks and Markov Chains
Queueing Networks and Markov Chains
Modeling 3-Tiered Web Applications
MASCOTS '05 Proceedings of the 13th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems
JMT: performance engineering tools for system modeling
ACM SIGMETRICS Performance Evaluation Review
Solving Enterprise Applications Performance Puzzles: Queuing Models to the Rescue
Solving Enterprise Applications Performance Puzzles: Queuing Models to the Rescue
Automatic, load-independent detection of performance regressions by transaction profiles
Proceedings of the 2013 International Workshop on Joining AcadeMiA and Industry Contributions to testing Automation
CSMR '13 Proceedings of the 2013 17th European Conference on Software Maintenance and Reengineering
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Using modelling to predict the performance characteristics of software applications typically uses Queueing Network Models representing the various system hardware resources. Leaving out the software resources, such as the limited number of threads, in such models leads to a reduced prediction accuracy. Accounting for Software Contention is a challenging task as existing techniques to model software components are complex and require deep knowledge of the software architecture. Furthermore, they also require complex measurement processes to obtain the model's service demands. In addition, solving the resultant model usually require simulation solvers which are often time consuming. In this work, we aim to provide a simpler model for three-tier web software systems which accounts for Software Contention that can be solved by time efficient analytical solvers. We achieve this by expanding the existing "Two-Level Iterative Queuing Modelling of Software Contention" method to handle the number of threads at the Application Server tier and the number of Data Sources at the Database Server tier. This is done in a generic manner to allow for extending the solution to other software components like memory and critical sections. Initial results show that our technique clearly outperforms existing techniques.