Explanation
Beginning with IBM® zEnterprise® 196 (z196), this
message follows message IWM063I whenever SRM is notified of a processor
speed change. 
Beginning
with the IBM z13™,
this message also follows message IWM063I whenever SRM is notified
of an MT mode change for a processor class.
Message IWM064I explains
the reason for the change reported by message IWM063I. Message IWM064I
will also be issued when the system is IPLed at reduced speed on z196,
or follow-on machines.
- THERE
WAS A CHANGE OF THE MT MODE FOR A PROCESSOR CLASS.
This message is preceded by message IWM066I, which shows the affected processor class and the change in MT mode.
- THE SYSTEM IS RUNNING AT NOMINAL CAPACITY.
For example, a cooling problem has been resolved and the system is running at nominal capacity again.
- THE SYSTEM IS RUNNING AT NOMINAL CAPACITY; MODEL CONVERSION
OCCURRED.
For example, the user may have upgraded or downgraded the capacity and the system is now running at the new nominal capacity.
- AN MSU TABLE UPDATE OCCURRED.
For example, the system's MSU table was updated. In this case, a second IWM064I message follows to report the actual state.
- THE SYSTEM IS RUNNING WITH REDUCED CAPACITY BECAUSE OF
A MANUAL CONTROL SETTING.
For example, the user may have initiated Power® Saving Mode.
- THE SYSTEM IS RUNNING WITH REDUCED CAPACITY BECAUSE OF
A MACHINE EXCEPTION CONDITION.
For example, there may have been a cooling problem.
- THE SYSTEM IS RUNNING WITH REDUCED CAPACITY BECAUSE OF
A NON-EXCEPTION MACHINE CONDITION.
For example, there may have been a firmware update.
- THE SYSTEM IS RUNNING WITH REDUCED CAPACITY BECAUSE OF
AN EXCEPTION CONDITION EXTERNAL TO THE MACHINE.
For example, the ambient temperature may have exceeded the maximum value.
System action
Processing continues.
Operator response
None.
System programmer response
None.
Source
Workload Manager (WLM)
Module
IWMP2RAC, IWMI2JST
Routing code
2,10
Descriptor code
4