High CPU in ENF

Products

• COMMON SERVICES FOR Z/OS

Issue/Introduction

Running CAIENF STC of CA Common Services for Top Secret CPF (command propagation of Top Secret changes on several partitions). 

Changed some parameters of  ENF to be able to use TCPIP/TLS rather than SNA. 

First, just adding the necessary statements to be able to use TCPIP, but now still using SNA and not yet TCPIP. 

Since making these changes, noticing a very high CPU consumption in the ENF STC.  

 

Environment

COMMON SERVICES 15.0 - z/OS supported releases - 

Cause

Incorrect manipulation of ENF EVENT status resulted in extremely long internal event chaining.

The "listen" that is built incorrectly is listening for ENFTERM, JOBTERM, and JOBFAIL events. However, JOBFAIL was set as Inactive.

By default, these events are delivered as "Active" based on definitions in DCM (Data Control Module) CAS9DCM0.

 

Use the ENF EVENT(event_name) console command to display status of interested event.

 

Resolution

Update the ENF parameters as follows:

change:

EVENT(JOBFAIL,INACT)
to
EVENT(JOBFAIL,ACT)

and recycle ENF.

 

Note: There is no command to verify the length of the event queue. This can only be verified by provided support with a SVCDUMP of the ENF address space.