ZQMAX parameter - Revision history

ELowell: /* Description */

2015-11-13T21:57:52Z

Description

← Older revision		Revision as of 21:57, 13 November 2015
Line 32:		Line 32:
	<p>		<p>
	For more information about zIIP processing, refer to [[Performance monitoring and tuning#Offloading Model 204 work to zIIP_processors\|Offloading Model 204 work to zIIP_processors]]. </p>		For more information about zIIP processing, refer to [[Performance monitoring and tuning#Offloading Model 204 work to zIIP_processors\|Offloading Model 204 work to zIIP_processors]]. </p>
			==Usage notes==
			As of Model 204 version 7.6, ZQMAX is deprecated. If you have specified a value for ZQMAX, it is ignored in 7.6 and higher.
	[[Category:System parameters]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

JAL: more conversion cleanup

2015-02-18T22:47:19Z

more conversion cleanup

← Older revision		Revision as of 22:47, 18 February 2015
Line 13:		Line 13:
	<dd><var class="product">Model 204 V7.4</var>		<dd><var class="product">Model 204 V7.4</var>
	</dl>		</dl>

	==Description==		==Description==
	<p>Applies to z/OS only</p>		<p>
	<p>On a z/OS system, <var class="product">Model 204</var> zIIP support enables you to offload <var class="product">Model 204</var> work from regular processors to zIIP processors.</p>		Applies to z/OS only</p>
	<p>ZQMAX limits the number of work units that may be placed for execution by the zIIP task.</p>		<p>
	<p>The default and maximum value for ZQMAX is 65535. </p>		On a z/OS system, <var class="product">Model 204</var> zIIP support enables you to offload <var class="product">Model 204</var> work from regular processors to zIIP processors.</p>
			<p>
			<var>ZQMAX</var> limits the number of work units that may be placed for execution by the zIIP task.</p>
			<p>The default and maximum value for <var>ZQMAX</var> is 65535. </p>
	<ul>		<ul>
	<li>		<li>
	If ZQMAX is set to a non-zero value:		If <var>ZQMAX</var> is set to a non-zero value:
	When a work unit is pushed onto the zIIP queue and the current zIIP queue length exceeds the value of ZQMAX, then that work unit is placed on the MP stack instead. Effectively, this limits the amount of work that is done on the zIIP and prevents zIIP overload.</li>		When a work unit is pushed onto the zIIP queue and the current zIIP queue length exceeds the value of <var>ZQMAX</var>, then that work unit is placed on the MP stack instead. Effectively, this limits the amount of work that is done on the zIIP and prevents zIIP overload.</li>
	<li>		<li>
	If ZQMAX is set to zero:		If <var>ZQMAX</var> is set to zero:
	No users will be added to the zIIP queue. However, if SCHDOPT-X'80' is on and a zIIP task is active (AMPSUBZ>0), then server swapping will occur on the zIIP task without the overhead of pushing zIIP work units onto the zIIP queue.</li>		No users will be added to the zIIP queue. However, if the <var>SCHDOPT</var> X'80' bit is on and a zIIP task is active (<var>AMPSUBZ</var> greater than 0), then server swapping will occur on the zIIP task without the overhead of pushing zIIP work units onto the zIIP queue.</li>
	</ul>		</ul>
	<p>For more information about zIIP processing, refer to ~~the Rocket <var class="product">~~Model~~ ~~204~~</var> System Manager's Guide~~. </p>		<p>
			For more information about zIIP processing, refer to [[Performance monitoring and tuning#Offloading Model 204 work to zIIP_processors\|Offloading Model 204 work to zIIP_processors]]. </p>

	[[Category:System parameters]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

DmeWiccan: Automatically generated page update

2013-08-27T16:51:52Z

Automatically generated page update

← Older revision		Revision as of 16:51, 27 August 2013
Line 1:		Line 1:
			{{Template:ZQMAX parameter subtitle}}
	==Summary==		==Summary==
	<dl>		<dl>

DmeWiccan: Automatically generated page update

2013-04-23T01:51:44Z

Automatically generated page update

← Older revision		Revision as of 01:51, 23 April 2013
Line 26:		Line 26:
	</ul>		</ul>
	<p>For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. </p>		<p>For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. </p>
	[[Category:System ~~Parameters~~]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

Dme: Undo revision 56993 by DmeWiccan (talk)

2013-04-19T14:47:51Z

Undo revision 56993 by DmeWiccan (talk)

← Older revision		Revision as of 14:47, 19 April 2013
Line 26:		Line 26:
	</ul>		</ul>
	<p>For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. </p>		<p>For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. </p>
	[[Category:System ~~parameters~~]]		[[Category:System Parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

DmeWiccan: Automatically generated page update

2013-04-19T14:39:21Z

Automatically generated page update

← Older revision		Revision as of 14:39, 19 April 2013
Line 26:		Line 26:
	</ul>		</ul>
	<p>For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. </p>		<p>For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. </p>
	[[Category:System ~~Parameters~~]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

Alex: Automatically generated page update

2013-02-28T00:57:25Z

Automatically generated page update

New page

==Summary==
<dl>
<dt>Default value
<dd>65535
<dt>Parameter type
<dd>System
<dt>Where set
<dd>On User 0's parameter line or reset by system manager.
<dt>Related products
<dd>All
<dt>Introduced
<dd><var class="product">Model 204 V7.4</var>
</dl>
==Description==
Applies to z/OS only
On a z/OS system, <var class="product">Model 204</var> zIIP support enables you to offload <var class="product">Model 204</var> work from regular processors to zIIP processors.
ZQMAX limits the number of work units that may be placed for execution by the zIIP task.
The default and maximum value for ZQMAX is 65535. 
<ul>
<li>
If ZQMAX is set to a non-zero value:
When a work unit is pushed onto the zIIP queue and the current zIIP queue length exceeds the value of ZQMAX, then that work unit is placed on the MP stack instead. Effectively, this limits the amount of work that is done on the zIIP and prevents zIIP overload.</li>
<li>
If ZQMAX is set to zero:
No users will be added to the zIIP queue. However, if SCHDOPT-X'80' is on and a zIIP task is active (AMPSUBZ>0), then server swapping will occur on the zIIP task without the overhead of pushing zIIP work units onto the zIIP queue.</li>
</ul>
For more information about zIIP processing, refer to the Rocket <var class="product">Model 204</var> System Manager's Guide. 
[[Category:System Parameters]]
[[Category:Parameters]]