AMPSUBS parameter: Difference between revisions
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{{Template:AMPSUBS parameter subtitle}} | |||
==Summary== | ==Summary== | ||
<dl> | <dl> | ||
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<dd><var class="product">Model 204 V6.1</var> or earlier | <dd><var class="product">Model 204 V6.1</var> or earlier | ||
</dl> | </dl> | ||
==Description== | ==Description== | ||
<p>The number of active subtasks in a <var class="product">Model 204</var> multiprocessing online configuration (IBM z/OS systems only)</p> | <p> | ||
<p>The value of AMPSUBS must be less than or equal to the value of the NMPSUBS parameter, which determines the number of subtasks attached during initialization. The AMPSUBS parameter allows the system manager to adjust the number of active offload subtasks without bringing down the online.</p> | The number of active subtasks in a <var class="product">Model 204</var> multiprocessing online configuration (IBM z/OS systems only)</p> | ||
<p>If AMPSUBS is less than NMPSUBS, the extra subtasks remain attached but do not perform offloaded work. If AMPSUBS is set to 0, the main task performs all the work and multiprocessing is effectively turned off.</p> | <p> | ||
<p>For more information about tuning MP, refer to | The value of <var>AMPSUBS</var> must be less than or equal to the value of the <var>[[NMPSUBS_parameter|NMPSUBS]]</var> parameter, which determines the number of subtasks attached during initialization. The <var>AMPSUBS</var> parameter allows the system manager to adjust the number of active offload subtasks without bringing down the online.</p> | ||
<p> | |||
If <var>AMPSUBS</var> is less than <var>NMPSUBS</var>, the extra subtasks remain attached but do not perform offloaded work. If <var>AMPSUBS</var> is set to 0, the main task performs all the work and multiprocessing is effectively turned off.</p> | |||
<p> | |||
For more information about tuning MP, refer to [[Performance monitoring and tuning#Multiprocessing (MP/204)|Multiprocessing (MP/204)]]. </p> | |||
[[Category:System parameters]] | [[Category:System parameters]] | ||
[[Category:Parameters]] | [[Category:Parameters]] | ||
Latest revision as of 23:31, 17 November 2014
Number of active offload subtasks
Summary
- Default value
- None
- Parameter type
- System
- Where set
- On User 0's parameter line or reset by system manager
- Related products
- All
- Introduced
- Model 204 V6.1 or earlier
Description
The number of active subtasks in a Model 204 multiprocessing online configuration (IBM z/OS systems only)
The value of AMPSUBS must be less than or equal to the value of the NMPSUBS parameter, which determines the number of subtasks attached during initialization. The AMPSUBS parameter allows the system manager to adjust the number of active offload subtasks without bringing down the online.
If AMPSUBS is less than NMPSUBS, the extra subtasks remain attached but do not perform offloaded work. If AMPSUBS is set to 0, the main task performs all the work and multiprocessing is effectively turned off.
For more information about tuning MP, refer to Multiprocessing (MP/204).