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The server(s) monitor the batch jobs that run on the LPARs where they are active. At a job or step start the status, history, statistical data, alert, threshold values, etc. are stored in internal server tables. The progress of the step is then monitored in the context of this information. Active job steps have their use of I/O, CPU, and elapsed time logged and checked for possible runaway and threshold condiditions etc. throughout the execution of the step.
The DM command is used to display the current internal server data for the monitored job/steps interactively. This gives you the ability to see actual, average, and predicted performance of the currently active job streams and individual job steps.
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