The SMFAJT query generates several chart sets. These chart sets show the daily top nn (default 10) APPC Transaction Programs (TPs) using CPU, I/O, and central storage (memory) resources on your z/OS systems. For each resource type, one chart set shows the top ten APPC TPs using the resource over the entire Central Processing Complex (CPC), and another that shows the top ten APPC TPs for each z/OS system. The query reads detail data from the BAT_TP (APPC/MVS TP Activity) file, and summarizes the data by job name executed. The charted data reflects summarized interval and step record information from all job steps for the top ten APPC TPs.
Note: While the chart samples displayed in this guide present the Top nn APPC TPs alphabetically, from left to right on the x-AXIS, the query has been updated to present the Top nn APPC Ts in order of descending resource use. The name of each APPC TP is prefixed with the resource usage rank. (for example, 01- jobnamea, 02- jobnameb, and so on.
For CPU, the CPU time used by each of the top ten APPC TPs is displayed using a vertical bar. The bar is segmented by CPU time type (for example, TCB, SRB, I/O Interrupt, zIIP, zAAP, and so on). Two horizontal lines show the program count (number of unique program executions) and interval count (number of interval records) encountered for the APPC TP. For short running steps, the interval count and program count values have similar values. For long running programs, the interval count exceeds the program count.
Note: The program count data element (PGMCOUNT) is only set to one (1) for the last interval record for a long running program. For APPC TPs with a long running program step that has not yet ended, PGMCOUNT is zero.
For I/O, I/O Service Units are used to determine the top ten APPC TPs. Three different chart views are available to display I/O related resource utilization. The first view shows I/O service units for the top ten using vertical bars. The second view displays device connect time for the top ten by device class (for example, DASD, TAPE, Unit Record, and so on). The device connect time is displayed using a vertical bar, with the bar segmented by the time connected to each of the device classes. The final view shows EXCPs by device class, again using a segmented vertical bar. As with the CPU chart, the program and interval record count are shown using a horizontal line.
For central storage, the top ten APPC TPs with the largest average working set size are displayed. Average working set size is the average number page frames in central storage used by the program. The page frame count is shown using a vertical bar and the program and interval record count are shown using a horizontal line.
Note: The average working set size represents the average for all step and interval records encountered for each top ten APPC TP.
The example shows the CPC level chart generated for APPC TSs executing on an IBM z196 2817-615 CPC. The largest user of CPU time was the APPC TP ‘TSTAPPC’. The chart shows that for the day depicted, the job had 2374 program step executions, recorded with 2374 interval records, and consumed just over 24 seconds of CPU time. Most of this time was Step TCB Time.
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