System management facilities (SMF) collects and records system and job-related information that your installation can use in:
Billing users
Reporting reliability
Analyzing the configuration
Scheduling jobs
Summarizing direct access volume activity
Evaluating data set activity
Profiling system resource use
Maintaining system security
These examples show the types of reports that can be created by using the information that SMF collects. Using SMF data describes each of these in more detail.
SMF formats the information that it gathers into system-related records (or job-related records). System-related SMF records include information about the configuration, paging activity, and workload. Job-related records include information on the CPU time, SYSOUT activity, and data set activity of each job step, job, APPC/MVS transaction program, and TSO/E session. (SMF records includes the formats of the SMF records.)
Using the SMF dump programs describes the dump program and how to dump SMF data sets and explains how to code and use them.
An installation can provide its own routines as part of SMF. These routines will receive control either at a particular point as a job moves through the system, or when a specific event occurs. For example, an installation written routine can receive control when the CPU time limit for a job expires or when an initiator selects the job for processing. The routine can collect additional information, or enforce installation standards. Customizing SMF, summarizes the available installation-written exits. z/OS MVS Installation Exits describes each SMF installation exit. Using the SMF dump programs describes the SMF dump program exits.
Because SMF data-collection and exit routines are independent of each other, the installation can use them separately or in combination. After analyzing the information that the SMF data-collection routines obtained, for example, the installation might choose to set a time limit for all jobs running on the system and then terminate any job that exceeds this limit. However, to allow certain jobs to bypass this restriction, the installation could add a routine at the SMF time limit exit (IEFUTL) to extend the time limit for those selected jobs.
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