Application Performance Analyzer for z/OS, Version 11.1, User's Guide

Detail line descriptions

DDNAME

This line identifies the DDNAME of a file for which delays due to wait for I/O completion were observed.

Under Heading This is Displayed
Description The volume ID (VOLSER) for the DDNAME. For a multivolume data set, the first volume is displayed.
Percent of Time The percentage of the measurement interval time the step was waiting for completion of I/O for the indicated DDNAME.

File I/O request

This line identifies the file request macro that caused a wait for I/O completion.

Under Heading This is Displayed
Name The DASD I/O macro function (GET, PUT, CHECK, etc.) that caused the wait.
Description The address of the macro (return address) in CSECT+offset format.
Percent of Time The percentage of the measurement interval time the step was waiting for completion of I/O for the indicated macro.

Load module

This line identifies the data management load module in which the wait occurred.

Under Heading This is Displayed
Name Name of load module in which WAIT request was issued.
Description Functional description of the load module if one is available.
Percent of Time The percentage of the measurement interval time the step was waiting for completion of I/O.

CSECT

This line identifies the CSECT in the data management load module in which the wait occurred.

Under Heading This is Displayed
Name Name of CSECT in which WAIT request was issued.
Description Functional description of the CSECT if one is available.
Percent of Time The percentage of the measurement interval time the step was waiting for completion of I/O.

Supervisor Call (SVC)

This line identifies an SVC (Supervisor Call) that issued the wait.

Under Heading This is Displayed
Name Name of SVC (Supervisor Call) in which WAIT request was issued.
Description Functional description of the SVC.
Percent of Time The percentage of the measurement interval time the step was waiting for completion of I/O.



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