If you have granted USS superuser privileges to the Application Performance Analyzer started task, you may skip this step.
For J9VM support, the Application Performance Analyzer started task must have an OMVS definition in RACF® to access USS data and programs. It requires USS authorization for the following:
The J9VM creates work files in the directory /tmp/.com_ibm_tools_attach.
If the Application Performance Analyzer configuration setting DiagLevel is set to 7 or higher, Application Performance Analyzer creates a diagnostic file for each observation request in the directory /tmp/CAZ. The diagnostic file is named sysid.nnnn.JVMTI.txt, where sysid is the Application Performance Analyzer started task identifier and nnnn is the observation request number.
Application Performance Analyzer also writes stdout annd stderr files in the /tmp/CAZ directory if DiagLevel is set to 7 or higher. The files are named sysid.stdout and sysid.stderr, where sysid is the Application Performance Analyzer started task identifier.
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