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Miscellaneous Keywords

FIGURE 20. Combined Interval Detail Display (TOTAL)

----------- | Group = 3 | Period: | Total of 1 +----------- | +----------- |COMPETING_S |Using CPU | Using CPU | Using CPU |DATABASE I/ |MVS WAITS |IMS WAITS |----------- +===========

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09:00 to 12:00 on 01/02/97 2 intervals

Elap =

3H

I51A | |

  • ------------------------------------------------------------------

    +

------------------------------------------------------------------ Symbolic Name = PSB3

|

DEGRADATION DATA

|

  • ------------------------------------------------------------------

    +

TATE

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ % _ | 0 _ _ _ 1 _ _ _ 2 _ _ _ 3 _ _ _ 4 _ _ _ 5 _ _ _ 6 _ _ _ 7 _ _ _ 8 _ _ _ 9 _ _ _ 0 |

  • ------------------------

    |

==================================================================+

in APPL

(6.9)|--> . (6.9)|--> . 13.8|--==>>

in IMS

O WAITS

5.2|--> . 7.6|--->. 12.9|----->

.| .| .| .| .| .|

Figure 19 on page 89 and Figure 20 give essentially the same results, except that the TOTAL display gives total rather than average wait percentages.

Bottleneck trend analysis (ON keyword)

A normal summary display shows only the bottleneck reason that accounted for the largest percentage of bottleneck during the interval. Use the ON keyword to see a wait percentage graph for the selected bottleneck reason (rather than worst bottleneck reason). This allows you to monitor certain bottleneck reasons over extended periods of time. The PLOTPCT keyword is a synonym for the ON keyword.

The SUMMARY option of the DISPLAY command allows you to show trends in bottlenecks over a given time period. There may be times, however, when you are more interested in the relative impact of a specific bottleneck reason. For example, if you notice that you are often spending a large percentage of time in database I/O waits for a specific database, you might want to see if this problem is getting worse. To do this, you need to examine what percentage of an average threads life is being spent waiting for database I/O.

To select a bottleneck reason, enter the ON keyword followed by the ID of the bottleneck reason. For example, if you enter the following command:

DIS SYSTEM SUMMARY SDATE(01/02/97) STIME(1544)- EDATE(01/02/97 ETIME(1814) ON(DBW) OMEGAMON II displays the following panel:

90

OMEGAMON II for DBCTL Historical Component (EPILOG) Reference Manual Version 510

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