(ZOS) SMF settings

Configure SMF records to collect job information to tune application server performance.

Here is a sample SMFPRMxx member that will create interval records every 2 minutes, and record the following SMF record types:

• 30 - Address space
• 70-79 - RMF™
• 82 - Crypto
• 88-90 - System Logger, Usage & System Data
• 101 - DB2
• 110 - CICS
• 120 - WebSphere

ACTIVE                      /*ACTIVE SMF RECORDING*/
    DSNAME(&SYSNAME..MAN1, &SYSNAME..MAN2)       /*TWO MAN DATASETS */
    LISTDSN                     /* LIST DATA SET STATUS AT IPL*/
    NOPROMPT                    /* DON'T PROMPT THE OPERATOR  */
    INTVAL(02)                  /* SMF GLOBAL RECORDING INTERVAL */
    SYNCVAL(00)                 /* GLOBAL SYNC VALUE             */
    MAXDORM(3000)               /* WRITE AN IDLE BUFFER AFTER 30 MIN*/
    STATUS(010000)              /* WRITE SMF STATS AFTER 1 HOUR*/
    SID(&SYSNAME(1:4))          /* USE SYSNAME AS SID     */
    SUBSYS(STC,INTERVAL(SMF,SYNC),
                          TYPE(0,30,70:79,88:90,101,110,120))   

Set the SMF recording interval to 2 minutes using the 'SET SMF=xx' command to activate the SMFPRMxx member from SYSx.PARMLIB. Use the 'D SMF,O' command to display the parameters in effect.

Use a tool like WSWS to simulate an application stress load.

While the transactions are running, switch to SDSF and RMF to observe the transactions.

Collecting job-related information with the System Management Facility (SMF)

Choose and using diagnosis tools and controls on z/OS

Diagnose problems (using diagnosis tools)