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Subsystem and Transaction Monitoring and Tuning with DB2 11 for z/OS by Yasuhiro Ohmori, Cathy Drummond, Adrian Burke, Felipe Bortoletto, Paolo Bruni

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Subsystem monitoring
Subsystem monitoring can occur at several different levels. The z/OS system programmer may be monitoring RMF (see Chapter 3, “System z related information” on page 29) to catch CPU constraints, WLM goals being missed, paging activity, as well as DASD device hot spots. All of these could bear evidence of bottlenecks affecting the DB2 subsystem or data sharing group performance. Generally in DB2, when subsystem monitoring is mentioned, we are referring to analysis of the SMF 100 statistics records. These statistics can help ...

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