Addressing OS/390 Web server performance. - IBM

4
Implementing a standard approach to performance management
The following flowchart provides a generic approach to performance analysis and tuning
for OS/390, UNIX ® and Windows NT ® systems. The goal is to create a proactive process
where problems are identified before users start complaining.
The first function is to define business objectives and identify a way to measure those
objectives. If the objectives are not being met, actions are initiated to isolate and fix the
problem. Once the cause of the problem has been identified, decide whether it is a
tuning issue or the result of a lack of resources. If it is the result of a lack of resources,
decide whether to buy more or rebalance resources from an existing application.
Rebalancing system resources from one application and giving them to another is not
the same as tuning. After making any changes, always verify that the problem was
corrected. The process begins again with the next scheduled measurement.
Set
Workload
Objectives
Check
Objectives
OK?
NO
Identify
Resource
Causing
Problem
YES
Wait
Buy
Rebalance
Tune
Verify the
Solution