SNA working-set module exits (XZCIN, XZCOUT, XZCOUT1, and XZIQUE)

These exits are invoked after I/O events or before messages are disassembled into request units (RUs).

You can use the XZIQUE exit to control the number of queued requests for sessions on MRO and APPC connections. For details, see XZIQUE exit for managing MRO and APPC intersystem queues.