57 lines
3.3 KiB
HTML
57 lines
3.3 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Central processing unit (CPU) and save-while-active" />
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<meta name="DC.Relation" scheme="URI" content="rzaiurzaiu334.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaiu335" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Central processing unit (CPU) and save-while-active</title>
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</head>
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<body id="rzaiu335"><a name="rzaiu335"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Central processing unit (CPU) and save-while-active</h1>
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<div><p>The relationship between the server's CPU and a save-while-active operation
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depends on the available CPU capacity and the characteristics of other jobs
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on the server</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiurzaiu334.htm">Performance considerations for save-while-active</a></div>
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</div>
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</div><div class="nested1" xml:lang="en-us" id="availablecpucapacity"><a name="availablecpucapacity"><!-- --></a><h2 class="topictitle2">Available CPU capacity</h2>
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<div><p>The amount of CPU capacity that is available for the save process can have
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a large influence on the time required for the save operation to complete.
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Therefore, be prepared for the save-while-active operation to take longer
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than a save operation on a restricted server. The change in the time required
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for the save operation to complete may be as little as 10 percent longer to
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four to five times longer or more. This depends on the server resources that
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are available for the save. As a guideline, allow only about 30% of
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the CPU for workloads that are running in the background.</p>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="conceptSunDec051558242004"><a name="conceptSunDec051558242004"><!-- --></a><h2 class="topictitle2">Characteristics of other jobs on the server</h2>
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<div><p>The active jobs during a save-while-active operation can affect both the
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response time and the duration of the save operation. Try to use the save-while-active
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function when CPU utilization is low and the amount of update activity on
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the server is low.</p>
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</div>
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</div>
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</body>
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</html>
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