Need detail on the PMODFDSS USERMOD and its function

Products

• PMO Runtime Performance Optimizer

Issue/Introduction

How does the communication happen between PMO & the ADRDSSU load module occur?

                                                                              

What are the performance concerns to ADRDSSU when PMO is active/when PMO is  

not active?                                                                   

Environment

Release: 4.4

Component: PMO

Resolution

The PMO DFDSS exit identifies the data set being processed, and then determines if there is a hash table for that  

data set.  If there is, the hash table is rebuilt later.  Since this is proprietary code, there is not much more I can say.                         

                                                                            

PMO is only involved with the data set identification, so the impact on  DFDSS is negligible.  We have never had any customer performance concerns   

with this area of the product.