Performance Metrics to be collected

Hi...

  I am in Learning curve about performance engineering and need clarity regarding the Performance Metrics to be collected during the LoadTest.

   Could anyone please share the OS level and Application level metrics to be collected for PHP, JAVA and dotNet applications, while running the LoadTest.

 And please clarify me that, are the metrics same for all or differes based on the technology the application is developed?

  Thanks in Advance.