<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="security" content="public" /> <meta name="Robots" content="index,follow" /> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' /> <meta name="DC.Type" content="concept" /> <meta name="DC.Title" content="Extended Adaptive Cache" /> <meta name="abstract" content="You can use Extended Adaptive Cache to improve system performance by collecting disk usage data, and then using those statistics to create a cache, effectively reducing the physical I/O requests for the disk." /> <meta name="description" content="You can use Extended Adaptive Cache to improve system performance by collecting disk usage data, and then using those statistics to create a cache, effectively reducing the physical I/O requests for the disk." /> <meta name="DC.Relation" scheme="URI" content="rzahxapsparent.htm" /> <meta name="DC.Relation" scheme="URI" content="rzahxeac1.htm" /> <meta name="DC.Relation" scheme="URI" content="rzahxgeteac.htm" /> <meta name="DC.Relation" scheme="URI" content="rzahxtune.htm" /> <meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" /> <meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" /> <meta name="DC.Format" content="XHTML" /> <meta name="DC.Identifier" content="rzahxintro" /> <meta name="DC.Language" content="en-us" /> <!-- All rights reserved. Licensed Materials Property of IBM --> <!-- US Government Users Restricted Rights --> <!-- Use, duplication or disclosure restricted by --> <!-- GSA ADP Schedule Contract with IBM Corp. --> <link rel="stylesheet" type="text/css" href="./ibmdita.css" /> <link rel="stylesheet" type="text/css" href="./ic.css" /> <title>Extended Adaptive Cache</title> </head> <body id="rzahxintro"><a name="rzahxintro"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Extended Adaptive Cache</h1> <div><p>You can use Extended Adaptive Cache to improve system performance by collecting disk usage data, and then using those statistics to create a cache, effectively reducing the physical I/O requests for the disk.</p> <p>Improve your <span class="keyword">iSeries™</span> system performance with Extended Adaptive Cache. Extended Adaptive Cache improves both the I/O subsystem and system response times by reducing the number of physical I/O requests that are read from disk. Extended Adaptive Cache generates statistical information for the data and then uses a mix of management strategies to determine which data to cache. </p> <div class="note"><span class="notetitle">Note:</span> <img src="./delta.gif" alt="Start of change" />In V5R4, Extended Adaptive Cache is supported on older <span class="keyword">iSeries</span> systems. Extended Adaptive Cache uses the feature code, #4331 1.6 GB Read Cache.<img src="./deltaend.gif" alt="End of change" /></div> </div> <div> <ul class="ullinks"> <li class="ulchildlink"><strong><a href="rzahxeac1.htm">Extended Adaptive Cache Concepts</a></strong><br /> Explore Extended Adaptive Cache. Find information about planning, restrictions, and important considerations before you begin to use this tool.</li> <li class="ulchildlink"><strong><a href="rzahxgeteac.htm">Get Extended Adaptive Cache</a></strong><br /> After obtaining the performance data from Extended Adaptive Cache Simulator and deciding that you want Extended Adaptive Cache to improve your system's performance, you must purchase a Read Cache Device (RCD). Extended Adaptive Cache is automatically enabled through the RCD.</li> </ul> <div class="familylinks"> <div class="parentlink"><strong>Parent topic:</strong> <a href="rzahxapsparent.htm" title="Managing performance on iSeries systems requires the use of a variety of specialized applications. Each of these applications offers a specific insight into system performance. This topic explains several applications and the intended use of each application.">Applications for performance management</a></div> </div> <div class="relconcepts"><strong>Related concepts</strong><br /> <div><a href="rzahxtune.htm" title="When you have identified a performance problem, you will want to tune the system to fix it.">Tune performance</a></div> </div> </div> </body> </html>