Performance analysis for any application must be managed at every stage of the SDLC.

Before application goes in to the hands of QA Team , profilers can be used as  performance management tools during coding and unit testing stages.QA team can use load testing tools to perform load test during the system validation and testing time and tools that deal with monitoring to monitor applications performance.

Here the following gives an idea of .NET application load test objects which should be calculated and its metrics.(Mapping between various servers and their respective metrics)

Server Type                                     Performance Object                    Performance Counter

All Servers                                           

( both Web Server and Database)         

                                                             Processor                              Processot time

                                                             Memory                                Available MBytes

                                                             Memory                                Pages/Sec
                                                             Network Interface                  Bytes Total/sec

                                                             Network Interface                  Output Queue Length
                                                             Server                                  Bytes Total/Sec
                                                             System                                 Processor QueueLength
                                                             System                                 Context Switches/Sec
                                                             Memory                                Pool Nonpaged Bytes
                                                             Cashe                                   MDL Read Hits%
                                                             Memory                                 Page Reads/Sec

Web Server

                                                             .NET CLR Memory                    # Gen 1 Collections
                                                             .NET CLR Memory                    # Gen 2 Collections
                                                             .NET CLR Memory                    % Time in GC
                                                             ASP.NET Applications                Requests Timed Out
                                                             ASP.NET Applications                Requests/Sec
                                                             ASP.NET                                  Request Wait Time
                                                             ASP.NET                                  Request Rejected

Database Server

                                                             Physical Disk                Avg. Disk Read Queue Length
                                                             Physical Disk                Avg. Disk Sec/Transfer
                                                             Physical Disk                Avg. Disk Write Queue Length.