This Natural profile parameter selects and activates or deactivates single or multiple new or changed Natural features supplied as selectable units.
For more information, see Selectable Units for New Natural Features in the Operations documentation.
Possible settings | OFF |
All selectable units (Natural features) are deactivated; any keyword subparameter settings are switched off. |
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Un={ON|OFF}
|
One or more selectable units (Natural features) are activated (ON )
or deactivated (OFF ) with the keyword subparameter
Un : see SELUNIT Parameter Syntax.
The |
|
Default setting | OFF |
|
Dynamic specification | yes | |
Specification within session | no |
The following selectable unit is available on z/OS:
Unit | Feature |
---|---|
U1 |
Compression and decompression of Natural threads by the
Natural Roll Server during roll-out and roll-in operations. This reduces CPU usage
by the Natural nucleus, and thus CPU consumption of the hosting TP system (CICS or
IMS TM) or the Natural server (Natural RPC server or Natural Development Server).
The compression routines run on an IBM System z Integrated Information Processor (zIIP), if available, improving overall performance of Natural. |
The following syntax applies:
SELUNIT={OFF|({Un={ON|OFF}},...) } |
Where:
n is a number from 1 to 24, each representing a specific feature as announced in the current Natural Release Notes for Mainframes.
SELUNIT=(U1=ON,U4=OFF)