Performance Bottleneck can be identified by monitoring the application against load and stress condition. To find bottleneck situation in performance testing, we use performance tools (NetDiagnostics(APM),Netstorm,NetForest etc ..). They provide different types of monitoring capabilities like Run-time monitor, Application Monitoring ,System Monitoring like Network delay monitor, System stats monitor, Database server monitor, ERP server resources monitor and Java performance monitor. 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.