Solving Enterprise Applications Performance Puzzles: Queuing Models to the Rescue [Paperback]

Poorly performing enterprise applications are the weakest links in a corporation's management chain, causing delays and disruptions of critical business functions. This groundbreaking book frames enterprise application performance engineering not as an art but as applied science built on model-based methodological foundation. The book introduces queuing models of enterprise application that visualize, demystify, explain, and solve system performance issues. Analysis of these models will help to discover and clarify unapparent connections and correlations among workloads, hardware architecture, and software parameters.

Acknowledgments ix

Preface xi

1. Queuing Networks as Applications Models 1

1.1. Enterprise ApplicationsWhat Do They Have in Common? 1

1.2. Key Performance IndicatorTransaction Time 6

1.3. What Is Application Tuning and Sizing? 8

1.4. Queuing Models of Enterprise Application 9

1.5. Transaction Response Time and Transaction Profile 19

1.6. Network of Highways as an Analogy of the Queuing Model 22

Take Away from the Chapter 24

2. Building and Solving Application Models 25

2.1. Building Models 25

Hardware Specification 26

Model Topology 28

A Models Input Data 29

Model Calibration 31

2.2. Essentials of Queuing Networks Theory 34

2.3. Solving Models 39

2.4. Interpretation of Modeling Results 47

Hardware Utilization 47

Server Queue Length, Transaction Time, System Throughput 51

Take Away from the Chapter 54

3. Workload Characterization and Transaction Profiling 57