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FIGURE 8. DETAIL Report

+=========== | Group = 3 | Period: 1 +----------- | +----------- |Competing_S |Database I/ | DI21PART | DI21PARO |IMS Waits | IRLM Confl |----------- +===========

=================================================

Symbolic Name = PAYROLL

9:30 to 19:45 on 01/02/97

Elap

-------------------------------------------------

DEGRADATION DATA ------------------------------------------------- tate__________________%_|0___1___2___3___4___5___ 54.7 |------------=========> O Waits

ict Wait

( 7.5 |--->. 5 . 7 ) | - - > . (9.4)|--->. . . . (41.5)|------------====> . . . . . .

. . .

.

------------------------ =================================================

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

=

15:00

M

I51A

| |

  • -----------------

    +

| -----------------+ 6___7___8___9___0| . . . . .| . . . . .| . . . . .| . . . . .| . . . . .| | =================+

The top portion of the report describes the workload (PSB group 3), the interval (19:30 to 19:45 on 01/02/97), and the elapsed time (15 minutes). The bottom portion lists competing states and their associated wait percentages. This bottleneck data is also known as degradation data.

A thread is in a competing state when it is being processed or when it is eligible to be processed but is waiting. That is, a thread in a competing state is either using CPU, doing I/O, or waiting in line behind other threads for its turn to do one of these tasks. A thread might wait in a dependent region, for example, if it is queued for an IMS latch.

The competing states are categorized as follows: using the CPU database I/O waits MVS waits IMS waits

The substates of the major types are indented, and their associated percentage figures are shown in parentheses.

The percentage figures and the graph in the DETAIL report are a profile of how often during the sampling period the system was found in various competing states that occur during the interval.

For example, according to Figure 8 , the system was in Database I/O Waits 54.7% of the time and in IMS Waits 7.5% of the time.

This display shows only competing states with associated percentage figures of 3% or more. The default is 5%; however, you can change this threshold figure using the SET PLOTMIN command.

The graph arrows represent the percentage figures. The arrows in the graph are broken into 30% ranges. The first range is indicated by a hyphen (-), the second by an equal sign (=), and the third by a greater-than sign (>).

66

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

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