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ABCs of z/OS System Programming Volume 13 by Juha Vainikainen, Paul Rogers

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JES3 Monitoring Facility (JMF)
System programmers can use the JES3 Monitoring Facility (JMF) to obtain statistical data of the system.
JES3 tuning and performance diagnosis requires a great deal of JES3 knowledge. JMF can expand the information that is available to the person attempting either of these tasks. It can also provide a great deal of interesting information, some of which has value and some of which is merely information.
You should run JMF regularly and when the system is running normally. When JES3 is running poorly you will have ...

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