Performance Explorer provides monitor charts and monitor reports to display and store measured values. 
               	 
               
 
                  		
                  - A monitor chart displays the measured values of a data source in real-time. You can adjust the polling interval of a monitor
                     chart. 
                     		
                  
  
                  		
                  - A monitor writer records the measured values of a data source and stores them in a .tsd file. Monitor writers are also useful
                     to compare server-side and client-side measures when a load test is completed. 
                     		
                  
  
                  	 
               
 
               	 
              
            	 
             
               		
               Note: A short polling interval can reduce the performance of your computer which, consequently, can influence test results. For
                  large load tests, define intervals greater than 60 seconds. 
                  		
               
 
               		
               Note: The values that display in a monitor chart cannot be written to a .tsd file afterwards.