Excessive CPU in GSS address space interfacing with Sysview for Db2

Products

• SYSVIEW Performance Management Option for DB2 for z/OS

Issue/Introduction

Increase in CPU in GSS address interfacing with Sysview Performance Management Option for Db2 for z/OS (IDB2) 
IDB2MEXC IMOD System Condition Monitor.

Cause

The high CPU was in the IDB2MEXC IMOD.  This IMOD adds exceptions to the System Condition Monitor.  The SCM main screen "Exception Count"
column for the subsystem revealed an extremely high number count for the RBNDRQRD exception.  This was the cause of the high CPU in
the IDB2MEXC IMOD in the GSS Address space.

Resolution

Turning off the RBNDRQRD exception in IDB2's Exception Processor and then recycling the Exception processor alleviated the high CPU in GSS.

Additional Information

A circumvention to disabling the RBNDRQRD exception would be to comment out the line:
'SCM-IMOD-NAME=IDB2MEXC' from the IDB2 SYSPARMS.  This will disable calls to this IMOD.