II_AFD_TIMEOUT is used to set the number of seconds before timeout in Vision’s Application Flow Diagram.

When you are using Vision’s Application Flow Diagram, Vision periodically checks for changes made by concurrent developers that affect the diagram. If such a change has been made, Vision notifies you and gives you a chance to update the display.

You can set II_AFD_TIMEOUT to any value greater than 20, or 0 to disable the timeouts. Setting the value to much less than the default of 300 seconds causes Vision to time out and query the database often enough to visibly affect performance.