Interval Bar Graph
The Interval Bar Graph (or histogram) is produced by using the GRAPH TYPE=PLOT or WLMGRAPH TYPE=PLOT Analyzer control statement. The data in this graph can be used to pinpoint peaks and valleys in the performance of your system over time.
The Extractor control statements that are required for the Interval Bar Graph are dependent upon the information to be graphed. (See Numeric list of SMF record types for information about the record types generated by each Extractor control statement and a description of the specific type of data collected by each Extractor control statement.)
The Interval Bar Graph is scaled to the largest LIMIT value that is specified in the Analyzer GRAPH or WLMGRAPH statement. The default limit is 100. Up to 16 measures can be specified; each measure is represented on the graph by a different character.
One line on the graph is produced for each interval that is specified in the GRAPH or WLMGRAPH statement. When more than one measure is represented, the character representing the smallest measure value during a single interval is displayed first on the line. If the interval default is used, one line is produced for each record interval encountered in the data.
The Interval Bar Graph is read from left to right. The value of each measure on the graph is determined by locating the rightmost character representing that measure; the value shown at that point is the value of the measure. For measures that have exactly the same value during a single interval, the character O is issued to indicate an overlap.
An example of the Interval Bar Graph is shown in the following figure.
BMC SOFTWARE, INC. XYZ COMPANY REPORT DATE: DD MMM YY 9.33
ACTL 10 JUN YY 06.45.01 10 JUN YY 07.45.00 WORLDWIDE HEADQUARTERS SYSTEM ID: SYSB Z v.rr.n
* REPRESENTS PAGESEC
+ REPRESENTS PAGETIMEC
= REPRESENTS CPU
O REPRESENTS OVERLAP
CPU ENVIRONMENT REQUESTED: ALL CPU'S
DATE TIME GRAPHIC DISPLAY OF INTERVAL TOTAL TIME
0 10 20 30 40 50 60 70 80 90 100
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
23MAY YY 17.56.53 O=======================================. . . . . . .
18.00.00 +*======================================. . . . . . .
18.30.00 +*======================================= . . . . . .
18.45.00 O======================================== . . . . . .
19.00.00 O=======================================. . . . . . .
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
Interval Bar Graph field descriptions
The table below describes each field in the Interval Bar Graph.
Field | Description |
|---|---|
c REPRESENTS xxxxxxx | character c, used to represent various measures, xxxxxxx, selected in GRAPH or WLMGRAPH statement |
DATE TIME | date and time of intervals at which samplings of the measures were made |
GRAPHIC DISPLAY OF INTERVAL TOTAL TIME | axis representing values for each measure, according to the far right character The values are not a continuum-type scale. They can be percentages, numerical count, and so on, depending on the measure being scaled. |
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