WebSphere Application Server Network Deployment, Version 6.x      Operating Systems: AIX, HP-UX, Linux, Solaris, Windows

Monitoring

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This section discusses how to create an overall monitoring strategy, including monitoring to understand these dimensions:

Monitoring end user response time
Monitoring end user response time is an external perspective of how the overall Web site performs from an end user view and identifies how long the response time is for an end user. From this perspective, it is important to understand the load and response time on your site. To monitor at this level, many industry monitoring tools, for example, Tivoli Monitoring for Transaction Performance, support you to inject and monitor synthetic transactions, helping you identify when your Web site experiences a problem.
Monitoring overall system health
Monitoring overall system health is of fundamental importance to understand the health of every system involved that includes Web servers, application servers, databases, back end systems, and any other systems critical to running your Web site. If any system has a problem, it might have a rippling effect and cause slow servlet response time. IBM and several other business partners leverage the WebSphere APIs to capture this kind of performance data and to incorporate this data into an overall 24-by-7 monitoring solution across multiple products. WebSphere Application Server provides Performance Monitoring Infrastructure (PMI) data to help monitor the overall health of the WebSphere Application Server environment. PMI provides average statistics on WebSphere Application Server resources, application resources, and system metrics. Many statistics are available in WebSphere Application Server, and you might want to understand the ones that most directly measure your site to detect problems
Monitoring application flow
This topic gives you a basic strategy for monitoring with an understanding of the application view. This information provides an understanding of how the application flow satisfies the end user request.