Once you have enabled statistics, you can get a variety of information on how your server instance and your virtual servers are running. The statistics are broken up into functional areas.
From the Server Manager, click the Monitor tab.
Click Monitor Current Activity.
From the drop-down list, choose the poll interval.
The poll interval is the number of seconds between updates of the statistics information displayed.
From the drop-down list, choose the kind of statistics you want displayed.
If your server instance is running, and you have enabled statistics/profiling, you see a page displaying the kind of statistics you selected. The page is updated every 5-15 seconds, depending upon what you chose for the poll interval.
You can use the data you see in statistics to tune your server. For more information, see the online Sun Java System Web Server 6.1 SP11 Performance Tuning, Sizing, and Scaling Guide.