PAGEFIX parameter: Difference between revisions

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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>
<p>
<var>PAGEFIX</var> specifies the page fixing feature, indicative of which areas are to be fixed.</p>
<var>PAGEFIX</var> specifies the [[Performance monitoring and tuning#Page fixing|page fixing]] feature, indicative of which areas are to be fixed in storage.</p>
<p>
<p>
<var>PAGEFIX</var> is not used under z/VM; it is used only under z/OS and z/VSE. </p>
<var>PAGEFIX</var> is not used under z/VM; it is used only under z/OS and z/VSE. </p>
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<table>
<table>
<tr class="head"><th>Setting</th><th>Fixes...</th></tr>
<tr class="head"><th>Setting</th><th>Fixes...</th></tr>
<tr><th align="right"><var>X'02000000'</var></th><td><var>RESPAGE</var> area.</td></tr>
 
<tr><th align="right"><var>X'01000000'</var></th><td>Server non-swappable (NSA) area.</td></tr>
<tr><th align="right"><var>X'04000000'</var></th>
<tr><th align="right"><var>X'00800000'</var></th><td>Open page buffers.</td></tr>
<td>main C PDL <br />(version 7.6 and higher)</td></tr>
<tr><th align="right"><var>X'00400000'</var></th><td><var>APSYPAGE</var> area.</td></tr>
 
<tr><th align="right"><var>X'00200000'</var></th><td>Checkpoint asynchronous buffers.</td></tr>
 
<tr><th align="right"><var>X'00100000'</var></th><td>DBIDs.</td></tr>
<tr><th align="right"><var>X'02000000'</var></th>
<td><var>[[RESPAGE parameter|RESPAGE]]</var> area. <br />(version 7.6 and higher)</td></tr>
 
<tr><th align="right"><var>X'01000000'</var></th>
<td>Server non-swappable (NSA) area.<br />(version 7.6 and higher)</td></tr>
 
<tr><th align="right"><var>X'00800000'</var></th><td>Open page buffers.<br />(version 7.6 and higher)</td></tr>
<tr><th align="right"><var>X'00400000'</var></th><td><var>[[APSYPAGE parameter|APSYPAGE]]</var> area. <br />(version 7.6 and higher)</td></tr>
<tr><th align="right"><var>X'00200000'</var></th><td>Checkpoint asynchronous buffers. <br />(version 7.5 and higher)</td></tr>
<tr><th align="right"><var>X'00100000'</var></th><td>DBIDs. <br />(version 7.6 and higher)</td></tr>
<tr><th align="right"><var>X'00080000'</var></th><td>Monitor real subtask work area.</td></tr>
<tr><th align="right"><var>X'00080000'</var></th><td>Monitor real subtask work area.</td></tr>
<tr><th align="right"><var>X'00040000'</var></th><td>Record descriptions.</td></tr>
<tr><th align="right"><var>X'00040000'</var></th><td>Record descriptions.</td></tr>
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<tr><th align="right"><var>X'00000400'</var></th><td>LPM and DSL for user files.</td></tr>
<tr><th align="right"><var>X'00000400'</var></th><td>LPM and DSL for user files.</td></tr>
<tr><th align="right"><var>X'00000200'</var></th><td>Physical extent blocks for CCATEMP.</td></tr>
<tr><th align="right"><var>X'00000200'</var></th><td>Physical extent blocks for CCATEMP.</td></tr>
<tr><th align="right"><var>X'00000100'</var></th><td>Physical extent blocks for user files.</td></tr>
 
<tr><th align="right"><var>X'00000080'</var></th><td>Journal control blocks and buffers.</td></tr>
<tr><th align="right"><var>X'00000100'</var></th>
<td>Physical extent blocks for user files.</td></tr>
 
<tr><th align="right"><var>X'00000080'</var></th>
<td>Journal control blocks and buffers.</td></tr>
 
<tr><th align="right"><var>X'00000040'</var></th><td>Buffers.</td></tr>
<tr><th align="right"><var>X'00000040'</var></th><td>Buffers.</td></tr>
<tr><th align="right"><var>X'00000020'</var></th><td>Buffer control blocks.</td></tr>
<tr><th align="right"><var>X'00000020'</var></th><td>Buffer control blocks.</td></tr>
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<tr><th align="right"><var>X'00000008'</var></th><td>STAT areas.</td></tr>
<tr><th align="right"><var>X'00000008'</var></th><td>STAT areas.</td></tr>
<tr><th align="right"><var>X'00000004'</var></th><td>SVIO work areas and Server swap pages.</td></tr>
<tr><th align="right"><var>X'00000004'</var></th><td>SVIO work areas and Server swap pages.</td></tr>
<tr><th align="right"><var>X'00000002'</var></th><td>CWAIT work areas.</td></tr>
<tr><th align="right"><var>X'00000002'</var></th><td>CWAIT work areas.</td></tr>
<tr><th align="right"><var>X'00000001'</var></th><td>KOMM.  </td></tr>
<tr><th align="right"><var>X'00000001'</var></th><td>KOMM.  </td></tr>
</table>
</table>


====PC TIMER requires KOMM to be pagefixed====
====Timer PC requires KOMM to be pagefixed====
<p>
<p>
Since the PC TIMER disables interrupts but still needs to reference KOMM, the following error message informs you to pagefix KOMM. This prevents possible 0C4 and X'11' return codes (commonly known as Page Translation Exceptions):</p>
Since the [[Performance monitoring and tuning#Timer PC|Timer PC]] disables interrupts but still needs to reference KOMM, the following error message informs you to pagefix KOMM. This prevents possible 0C4 and X'11' return codes (commonly known as Page Translation Exceptions):</p>
<p class="code">M204.2447: KOMM MUST BE PAGE FIXED TO USE PCTIMER
<p class="code">M204.2447: KOMM MUST BE PAGE FIXED TO USE PCTIMER
</p>
</p>

Latest revision as of 12:04, 14 March 2017

Page-fix parameter string

Summary

Default value
X'00000000'
Parameter type
System
Where set
On User 0's parameter line
Related products
All
Introduced
Model 204 V2.1 or earlier

Description

PAGEFIX specifies the page fixing feature, indicative of which areas are to be fixed in storage.

PAGEFIX is not used under z/VM; it is used only under z/OS and z/VSE.

Valid settings of PAGEFIX are (options can be summed):


SettingFixes...
X'04000000' main C PDL
(version 7.6 and higher)
X'02000000' RESPAGE area.
(version 7.6 and higher)
X'01000000' Server non-swappable (NSA) area.
(version 7.6 and higher)
X'00800000'Open page buffers.
(version 7.6 and higher)
X'00400000'APSYPAGE area.
(version 7.6 and higher)
X'00200000'Checkpoint asynchronous buffers.
(version 7.5 and higher)
X'00100000'DBIDs.
(version 7.6 and higher)
X'00080000'Monitor real subtask work area.
X'00040000'Record descriptions.
X'00020000'Server areas.
X'00010000'Record enqueuing table.
X'00008000'Resource enqueuing table.
X'00004000'User/file mode table.
X'00002000'File save areas.
X'00001000'DCB areas (DTF areas in VSE).
X'00000800'LPM and DSL for CCATEMP.
X'00000400'LPM and DSL for user files.
X'00000200'Physical extent blocks for CCATEMP.
X'00000100' Physical extent blocks for user files.
X'00000080' Journal control blocks and buffers.
X'00000040'Buffers.
X'00000020'Buffer control blocks.
X'00000010'Buffer hash field.
X'00000008'STAT areas.
X'00000004'SVIO work areas and Server swap pages.
X'00000002'CWAIT work areas.
X'00000001'KOMM.

Timer PC requires KOMM to be pagefixed

Since the Timer PC disables interrupts but still needs to reference KOMM, the following error message informs you to pagefix KOMM. This prevents possible 0C4 and X'11' return codes (commonly known as Page Translation Exceptions):

M204.2447: KOMM MUST BE PAGE FIXED TO USE PCTIMER

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