WAITSCAN parameter - Revision history

DCameron: /* Summary */

2017-12-06T15:08:46Z

Summary

← Older revision		Revision as of 15:08, 6 December 2017
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	<dd>All		<dd>All
	<dt>Introduced		<dt>Introduced
	<dd><var class="product">Model 204 V6.1</var> or earlier		<dd><var class="product">Model 204 V2.1</var> or earlier
	</dl>		</dl>

	==Description==		==Description==
	<p>The real-time interval that is allowed to pass between wait queue checks</p>		<p>The real-time interval that is allowed to pass between wait queue checks</p>

DmeWiccan: Automatically generated page update

2013-08-27T16:50:30Z

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			{{Template:WAITSCAN parameter subtitle}}
	==Summary==		==Summary==
	<dl>		<dl>

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2013-04-23T01:51:42Z

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	<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>		<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>
	[[Category:Scheduler parameters]]		[[Category:Scheduler parameters]]
	[[Category: System ~~Parameters~~]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

Dme: Undo revision 56810 by DmeWiccan (talk)

2013-04-19T15:58:52Z

Undo revision 56810 by DmeWiccan (talk)

← Older revision		Revision as of 15:58, 19 April 2013
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	<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>		<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>
	[[Category:Scheduler parameters]]		[[Category:Scheduler parameters]]
	[[Category:System ~~parameters~~]]		[[Category: System Parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

Dme: Undo revision 57180 by Dme (talk)

2013-04-19T15:36:56Z

Undo revision 57180 by Dme (talk)

← Older revision		Revision as of 15:36, 19 April 2013
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	<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>		<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>
	[[Category:Scheduler parameters]]		[[Category:Scheduler parameters]]
	[[Category: System ~~Parameters~~]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

Dme: Undo revision 56810 by DmeWiccan (talk)

2013-04-19T15:36:12Z

Undo revision 56810 by DmeWiccan (talk)

← Older revision		Revision as of 15:36, 19 April 2013
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	<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>		<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>
	[[Category:Scheduler parameters]]		[[Category:Scheduler parameters]]
	[[Category:System ~~parameters~~]]		[[Category: System Parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

DmeWiccan: Automatically generated page update

2013-04-19T14:14:46Z

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	<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>		<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>
	[[Category:Scheduler parameters]]		[[Category:Scheduler parameters]]
	[[Category: System ~~Parameters~~]]		[[Category:System parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

DmeWiccan: Automatically generated page update

2013-04-19T14:12:25Z

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	<p>Decreasing this parameter reduces the time it takes for a lower priority user to get preempted, thus increasing the response differential between low and high priority users. However, decreasing this value also increases scheduler overhead. Because the effect on scheduler overhead is particularly strong, do not decrease the parameter without sufficient reason.</p>		<p>Decreasing this parameter reduces the time it takes for a lower priority user to get preempted, thus increasing the response differential between low and high priority users. However, decreasing this value also increases scheduler overhead. Because the effect on scheduler overhead is particularly strong, do not decrease the parameter without sufficient reason.</p>
	<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>		<p>Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. </p>
	[[Category: Scheduler ~~Parameters~~]]		[[Category:Scheduler parameters]]
	[[Category: System Parameters]]		[[Category: System Parameters]]
	[[Category:Parameters]]		[[Category:Parameters]]

Alex: Automatically generated page update

2013-02-28T00:57:19Z

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==Summary==
<dl>
<dt>Default value
<dd>250
<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 V6.1</var> or earlier
</dl>
==Description==
The real-time interval that is allowed to pass between wait queue checks
WAITSCAN specifies the period in milliseconds at which lower priority CPU-bound users are preempted by higher priority users whose I/O has completed. 
Decreasing this parameter reduces the time it takes for a lower priority user to get preempted, thus increasing the response differential between low and high priority users. However, decreasing this value also increases scheduler overhead. Because the effect on scheduler overhead is particularly strong, do not decrease the parameter without sufficient reason.
Increasing this parameter allows CPU-bound users to periodically lock out other users, reducing system throughput. 
[[Category: Scheduler Parameters]]
[[Category: System Parameters]]
[[Category:Parameters]]