Activating SMF and CMF RMF parameters
To collect performance data, the following requirements must be met:
- SMF and CMF or RMF must be active.
- SMF must have the IEFU83 and IEFU84 exits specified for the areas for which data collection is desired.
- The SMF global recording interval should be specified unless the system default of 30 minutes is acceptable. The SMF global recording interval should be synchronized with some part of the hour unless the system default of 00 is acceptable.
- The CMF or RMF recording interval duration must be equal to or an even multiple of the SMF recording interval duration. For example, if the SMF recording interval duration is 30 minutes, the CMF or RMF recording interval may be 5, 10, 15, or 30 minutes.
- The CMF or RMF recording interval must be synchronized to the same part of the hour as SMF.
- Generally SMF types 30, 42, 73, 74, and 78 records must be collected. However, the SMF type 73 and 78 records are not required when running on a VM guest. The SGP_SMF42 system parameter in the SMMSYSxx member can control the actual recording of the type 42 records in the SMF data set.
For more information, see:
- CMF requirements for data collection
- RMF requirements for data collection
- SMF requirements for data collection
CMF requirements for data collection
The recording interval of either CMF or RMF must be equal to or an even multiple of the SMF recording interval.
The following parameters are the minimum required for CMF:
CHANNEL
DEVICE class="DASD"
In this example, xx is equal to or an even multiple of the SMF recording interval duration; yy is equal to the SMF recording interval part of the hour synchronization value.
The following table lists the keywords required in the CMFCPMxx member to collect the specified records.
Record type | Required keyword | Data collected |
|---|---|---|
Type 73 | CHANNEL | Channel activity |
Type 74-1 | DEVICE | Device activity |
Type 74-2 | XCFDATA | Cross-system coupling facility (XCF) |
Type 74-3 | OMVS | Open edition IBM MVS |
Type 74-4 | CFDATA | Coupling facility |
Type 74-5 | CACHE | Cache data records |
Type 78-1 | IOQ | I/O queuing data for 4381 and 3080 processors |
Type 78-2 | VSMDATA | Virtual storage data |
RMF requirements for data collection
If you are running RMF, the PARMLIB member must specify the following measurement, timing, and recording options:
Measurement | CHAN DEVICE(DASD) |
Timing | SYNC(SMF) (synchronizes SMF/RMF intervals) |
Recording | RECORD |
To create RMS post processor-compatible 74-5 records, you must stipulate the following in CMFCPMxx:
CACHE CMFREC=74 generates 74-5 SMF records and 240-27 records, whereas, the CACHE keyword used alone generates 240-27 records for the BMC Software proprietary cache reports.
SMF requirements for data collection
The following example shows how to set up SMF for the proper exits and recording of SMF records:
SYNCVAL(15) /*Synchronization value*/
ACTIVE /*ACTIVE SMF RECORDING*/
DSNAME(SYS1.MAN1,SYS1.MAN2,SYS1.MAN3) /* THREE DATA SETS */
NOPROMPT /*DO NOT PROMPT OPERATOR FOR OPTIONS*
REC(PERM) /*TYPE 17 PERM RECORDS ONLY*/
MAXDORM(3000) /* WRITE AN IDLE BUFFER AFTER 30 MIN*
STATUS(010000) /* WRITE SMF STATS AFTER 1 HOUR*/
JWT(0800) /* 522 AFTER 8 HOURS */
SID(SYSG) /* SYSTEM ID IS SYSG */
LISTDSN /* LIST DATA SET STATUS AT IPL*/
LASTDS(MSG) /*DEFAULT TO MESSAGE */
NOBUFFS(MSG) /*DEFAULT TO MESSAGE */
SYS(EXITS(IEFU83,IEFU84,IEFACTRT,IEFUJV,
IEFUSI,IEFUJI,IEFUTL,IEFU29),INTERVAL(SMF,SYNC),
NODETAIL
SUBSYS(STC,EXITS(IEFU29,IEFU83,IEFU84,IEFUJP,IEFUSO),
INTERVAL(SMF,SYNC))
SUBSYS(xxxx,EXITS(IEFU29,IEFU83,IEFU84,IEFUJP,IEFUSO),
INTERVAL(SMF,SYNC)) /*xxxx IS SUBSYSTEM CMF TASK IS USING */