6.17 Depict System, Demand, and Swap Paging Relationship

Reporting Examples › 6.17 Depict System, Demand, and Swap Paging Relationship

6.17 Depict System, Demand, and Swap Paging Relationship


PROBLEM:

    The need to quantify and understand the paging activity
    in a processor on which online systems are operating is
    absolutely essential for effective system performance.
    A report graphically plotting system and demand paging
    rates and the swap rate for the prime shift of the day
    is required.


DATABASE FILES TO BE ACCESSED:

    &PSCPX..SCPPAG01
        Yesterday's z/OS Paging Activity File


SUGGESTED SAS FACILITIES TO BE USED FOR REPORTING:

    PROC PLOT may be used to produce a single scatter plot
    illustrating all three rates.


SAS CODE EXAMPLE:

************************************************************;
* PAGING ANALYSIS GRAPHIC                                  *;
************************************************************;
 DATA ;
 SET &PSCPX..SCPPAG01;
 IF ZONE='1';
 ENDTM=TIMEPART(ENDTS);
 ENDMM=MINUTE(ENDTM);
 FORMAT HRMM $5.;
 HRMM=PUT(HOUR,2.) || ':' || PUT(ENDMM,2.);
 PROC PLOT; PLOT
   PAGPSSPG*HRMM='P'
   PAGPSDPG*HRMM='D'
   PAGPSSWP*HRMM='S' / OVERLAY;
 TITLE "Z/OS PAGE/SWAP ACTIVITY PROFILE";
 TITLE2 "SYSTEM PAGING, DEMAND PAGING, AND SWAP RATE";


GENERATED OUTPUT REPORT:

    Figure 6-15 illustrates the output reports produced by
    the SAS code illustrated above.

Z/OS PAGE/SWAP ACTIVITY PROFILE 16:18 THURSDAY, APRIL 20, yyyy SYSTEM PAGING, DEMAND PAGING, AND SWAP RATE PLOT OF PAGPSSPG*HRMM SYMBOL USED IS P PLOT OF PAGPSDPG*HRMM SYMBOL USED IS D PLOT OF PAGPSSWP*HRMM SYMBOL USED IS S 30 + | P P | D | 27 + | | P P P D | P D D 24 + D P | P P | D D D D | P P P P D D P E 21 + D D P M | P A | D D D D N | P P D 18 + D | P D P | P P A | G 15 + D D P D D E | D P | P R | P A 12 + P P T | D D D D E | D P P P P | D D D 9 + D P P | P | | 6 + D | D P | P S S | D S 3 + D P S S S | P | S S S S S S S S S S S S S | S S S S S S S S 0 +-------+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--- 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 8 8 8 8 9 9 9 9 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 6 6 6 6 7 7 7 7 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 0 1 3 4 0 1 3 4 1 3 4 0 1 3 4 0 1 3 4 0 1 3 4 0 1 3 4 1 3 4 0 1 3 4 0 1 3 4 0 5 0 5 0 5 0 5 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 5 0 5 0 5 0 5 0 5 0 5

Figure 6-15.  System and Demand Paging and Swap Rate Report