Select the Stand-Alone Instances component.
Select the instance named server in the table.
This is the Admin Server.
Select the Advanced tab.
Check the Reload Enabled box to enable dynamic reloading.
Enter a number of seconds in the Reload Poll Interval field.
This sets the interval at which applications and modules are checked for code changes and dynamically reloaded. The default is 2.
For details, see the Sun Java System Application Server Enterprise Edition 8.2 Administration Guide.