Go to the Preferences tab.
Click the Performance Tuning link.
Enter the value in the Maximum simultaneous requests field.
For more information about the RqThrottleMinPerSocket and RqThrottle parameters, see the Sun Java System Web Server 6.1 SP12 Administrator’s Configuration File Reference.
For detailed information about the performance implications of these settings and others, see the Sun Java System Web Server 6.1 SP12 Performance Tuning, Sizing, and Scaling Guide.