Supporting On Demand Business Applications with the IBM Problem Determination Tools (APA, DT, DT with Advanced Facilities, FA, File Export, FM, WS)

250 Supporting On Demand Business Applications with the IBM Problem Determination Tools

12.1.6 I08 - IMS DL/I WAIT Time by PSB

I08 identifies any delays caused by wait conditions in IMS regions. This report shows wait

time by IMS PSB and is meaningful when measuring a region in which multiple IMS PSBs are

scheduled. Only wait time observed when an IMS PSB is active is reported. Wait time is

identified both within the processing of DL/I calls and outside of DL/I call processing.

Each report line quantifies wait time as a percentage of the overall time during which IMS

PSBs were active, as shown in Figure 12-16.

Figure 12-16 I08: IMS WAIT Time by PSB (expanded)

Note: Any time when no IMS programs were active is excluded. This ensures that

quantifications are not distorted by inactive intervals such as those that occur between

scheduled transactions.

Chapter 12. Application Performance Analyzer: analyzing a job with subsystem 251

Because source program mapping data is available, by entering the P line command on any

line where csect + offset is displayed, Application Performance Analyzer displays the source

code for the statement, as shown in Figure 12-17, for DLI call number 00001.

Figure 12-17 P01: Source Program Attribution (from I08)

It is also possible (by entering the + line command on any DDname) to show additional details

(the same information as D04: Dataset Attributes for non-VSAM file or D06: DASD VSAM

Statistics for VSAM file), as shown in Figure 12-18, for DR2F.

Figure 12-18 Additional details (D06) for VSAM file from I09