SMFPRMxx (system management facilities (SMF) parameters)
The SMFPRMxx member allows you to control how system management facilities (SMF) works at your
installation. You can use SMFPRMxx parameters to accomplish the following tasks:
- Identify the system on which SMF is active.
- Specify global values for interval recording and synchronization that SMF, RMF, and other requesters can use to schedule the execution of their interval functions.
- Specify the data sets or log streams to be used for SMF recording.
- Allow compression of SMF data before recording to log streams.
- Specify the system identifier to be used in all SMF records.
- Select the SMF record types and subtypes SMF is to generate.
- Allow the operator to change the SMF parameters that are established at IPL.
- Specify the job wait time limit.
- Specify whether SMF is to invoke installation-supplied SMF exit routines.
- Specify whether the SMF dump program is to attempt to recover from abends.
- Specify the system response when SMF has used all of the buffered storage in its address space and is recording on data sets.
- Specify the system response when the last SMF data set is filled and no other data sets are available for use.
- Specify the amount of real time that SMF allows data to remain in an SMF buffer before it is written to a recording data set or a log stream.
- Specify the installation default MEMLIMIT.
- Specify whether only registration data and not usage data is to be recorded when using the IFAUSAGE macro.
- Specify valid user exists for the IFASMFDP and IFASMFDL programs.
- Specify whether to suppress empty execute channel program (EXCP) using the EMPTYEXCPSEC parameter.
- Specify whether SMF record flood support is active and the filter for the SMF record flood.
- Specify whether SMF is to generate digital signatures for records recorded to log streams.
- Specify whether SMF is to record records to in-memory resources for real-time analysis.
- Specify whether SMF is to record high-frequency throughput statistics.
- Specify whether to enable IBM z/OS Workload Interaction Correlator.
Note: If you specify that SMF is to record on data sets, the SMF data sets must be cataloged on
DASD. If there are no data sets for SMF to use, SMF buffers data until you specify a data set for
SMF to use. If SMF runs out of buffers, there might be a loss of data.
You can specify SMF parameters in several ways:
- Before the first IPL of a newly generated system by creating an SMFPRMxx parmlib member.
- At each initialization of SMF by entering the parameters at the console.
- During SMF execution, by using the SET SMF command to specify a different SMFPRMxx parmlib member or by using the SETSMF command to replace one or more previously defined SMF parameters.