Enabling the Problem Determination Aid (PDA) facility

The PDA facility default operating mode is trace enabled at DFSMSrmm startup.

You should continuously enable PDA tracing when DFSMSrmm is active since the processing overhead is minimal. If you define the EDGPDOX and EDGPDOY DD statements in the DFSMSrmm startup procedure, the EDGPDOX and EDGPDOY data sets are swapped and trace output is logged in the data sets.

You can control PDA tracing by using these z/OS MODIFY command keywords. You can also enable or disable the PDA facility by using the parmlib OPTION command PDA operands that are described in Defining system options: OPTION.

PDA=ON|OFF: Specify to turn PDA tracing on or off.
PDALOG=ON|OFF|SWAP: Specify to control the LOGGING function during PDA tracing.

Example: Use the z/OS MODIFY command to enable PDA tracing.

F DFRMM,PDA=ON

The PDA log data sets are automatically swapped at DFSMSrmm startup. After startup, use the z/OS MODIFY command PDALOG=SWAP to manually swap the data sets as required. For information on how to manually swap the PDA log data sets, see z/OS DFSMSrmm Diagnosis Guide manual for details.