USING THE Z/OS SNMP MIB TO SOLVE PERFORMANCE PROBLEMS

摘要

The new z/OS 1.2 TCP/IP stack introduces a greatly enhanced Simple Network Management Protocol (SNMP) Management Information Base (MIB) to allow the systems programmer to do diagnostics for the TCP/IP stack and sessions. The SNMP MIB includes hundreds of variables to analyze the core Internet protocols: Internet Protocol (IP), Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Internet Control Message Protocol (ICMP) plus many other variables not available by any other means. Data such as backlog for Listener sessions or IP packets dropped for Communication Storage Manager (CSM) memory shortages provide invaluable sources of data to monitor for z/OS performance and troubleshooting. This paper will provide an introduction to SNMP, an overview of the z/OS MIB, discuss some interesting MIB tables and conclude with case studies where specific MIB variables may be used effectively for troubleshooting.