Practical Service Level Management: Delivering High-Quality Web-Based Services

Transaction Response Time: An Example of Dependence on Lower-Level Services

Transaction response time is the primary metric of application service quality as delivered to the end user. It's also an excellent example of the dependence of an application-level quality metric on lower-level services with their associated metrics. In addition, it shows the need for communications between applications design groups and the network services and operations groups. Because of its importance, and because it's such a good example, this section traces the dependencies of transaction response time through all the underlying services and their relevant metrics. (Chapters 9 and 10 present additional details about metrics for the web-server systems and transport ...