How to identify the performance bottlenecks situations?

We need to configure performance monitoring tools on all the servers under test(Application, Web, Database servers). These tools will help us to see how servers are behaving against load and stress conditions. These monitors can help to us to determine the condition which causes increased response time of the application. The measurements of performance of the application are based on response time, throughput, hits per sec, network delay graphs, etc

Mostly used tool for conducting performance test is HP Loadrunner. This tool can collate with various monitoring tools which helps to relate the performance test results with the monitoring tool graphs and this in turn help us to identify performance bottlenecks.