Running Batch Reports in Mainframe Application Tuner (MAT) 10.0 is resulting in a S878 Abend

Products

• Mainframe Application Tuner

Issue/Introduction

Running Batch Reports in Mainframe Application Tuner (MAT) 10.0 is resulting in a S878 Abend.

Environment

Release:
Component: MATUNE

Resolution

If you attempt to monitor a job that may be spinning off a lot secondary address spaces and CA MAT is trying to fire up a measurement for each and every one of them, this error can occur.  This would be the APAR to handle this error:  RO84616

++PTF (RO84616) 
/************************************************************************** 
S878 DUE TO MONITORING SPAWNED USS PROCESSES 
PROBLEM DESCRIPTION: 
When measuring an address space that spawns additional USS processes, 
CA MAT starts measurements for these address spaces too. This is a useful 
feature, but if the address space being measured spawns a high number of 
processes the CA MAT server can be overloaded with monitoring requests 
and run out of memory in a subpool. The PTF makes this feature optional. 

SYMPTOMS: 

S878 or similar abend, or S40D abend if memory ran out during recovery 

Also make sure that in TUNSSP00 that USSMON = NO.