Integration Server 10.3 | Integration Server Administrator's Guide | Configuring Ports | Considerations for Adding Ports | Considerations for Configuring Ports | AS/400 Considerations
 
AS/400 Considerations
The port queue is the number of outstanding inbound connections that are queued in a TCP/IP stack. If your server runs on AS/400, you should limit the size of the port queue by adding the line “watt.server.portQueue=511” to the server property settings.
For instructions on adding server property settings, see Working with Extended Configuration Settings.