Method of dynamically adjusting SNA network control program parameters

Claim 1

A tunable Systems Network Architecture network, referred to as a SNA network, comprising: (a) a plurality of controllers each of which transmits messages to and receives messages from other said controllers via one or more communications links, each said link providing a communications path between two said controllers; (b) a plurality of network control program control processes, referred to as NCP processes, each one of said plurality of NCP processes executing in one of said plurality of controllers and controlling said transmission and receipt of messages by said one of said plurality of controllers in accordance with at least one of a plurality of tunable parameters; and (c) a plurality of controller-NEWPROG subprocesses, each one of said controller NEWPROG subprocesses executing as part of a respective one of said plurality of NCP processes, wherein each said controller-NEWPROG subprocess (1) monitors the messages transmitted and received by said respective controller and (2) alters one or more of said plurality of tunable parameters without regenerating said respective one of said plurality of NCP processes, wherein at least one of said plurality of tunable parameters is selected from the group consisting of Boundary PIU Pool, CWALL, SLODOWN, AVGPB, DATAMODE, GP3174, IRETRY, MAXDATA, MAXOUT, PASSLIM, RETRIES(n), RETRIES(t), TG Low Priority Threshold, TG Medium Priority Threshold, TG High Priority Threshold, TG Total Priority Threshold, Current Window Size, Minimum Window Size, Maximum Window Size, VR PIU Pool Threshold, DELAY, HDXSP, LSPRI, Multi-Link TG List, PAUSE, RETRIES(m), SERVLIM, and TRANSFR.