79 lines
4.8 KiB
HTML
79 lines
4.8 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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<meta name="DC.Title" content="Improve distributed relational database performance through the network" />
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<meta name="abstract" content="You can improve the performance of your network in various ways." />
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<meta name="description" content="You can improve the performance of your network in various ways." />
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<meta name="DC.subject" content="performance, improving through the network, network, improving performance through" />
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<meta name="keywords" content="performance, improving through the network, network, improving performance through" />
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<meta name="DC.Relation" scheme="URI" content="../books/sc415406.pdf" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Improve distributed relational database performance through the network</title>
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</head>
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<body id="rbal1improve"><a name="rbal1improve"><!-- --></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">Improve distributed relational database performance through the network</h1>
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<div><p>You can improve the performance of your network in various ways.</p>
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<div class="section"><p>Among them are the following ways: </p>
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<ul><li>Line speed</li>
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<li>Pacing</li>
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<li>Frame size</li>
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<li>RU sizing</li>
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<li>Connection type (nonswitched versus switched) <div class="p"> <div class="note"><span class="notetitle">Note:</span> Unprotected
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conversations are used for DRDA<sup>®</sup> connections under one of the following circumstances:<ul><li>When the connection is performed from a program using remote unit of work
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(RUW) connection management</li>
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<li>If the program that is making the connection is not running under commitment
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control</li>
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<li>If the database to which the connection is made does not support two-phase
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commit for the protocol that is being used</li>
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</ul>
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If the characteristics of the data are such that the transaction only
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affects one database management system, establishing the connection from a
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program using RUW connection management or from a program running without
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commitment control can avoid the overhead associated with two-phase commit
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flows.</div>
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</div>
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<p>Additionally, when conversations are kept active with
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DDMCNV(*KEEP) and those conversations are protected conversations, two-phase
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commit flows are sent regardless of whether the conversation was used for DRDA or
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DDM processing during the unit of work. Therefore, when you run with DDMCNV(*KEEP),
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it is better to run with unprotected conversations if possible. If running
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with protected conversations, you should run with DDMCNV(*DROP) and use the
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RELEASE statement to end the connection and the conversation at the next commit
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when the conversation will not be used in future units of work.</p>
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</li>
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</ul>
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</div>
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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="rbal1perform.htm" title="No matter what kind of application programs you are running on a server, performance can always be a concern. For a distributed relational database, network, server, and application performance are all crucial.">Performance</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../books/sc415406.pdf " target="_blank">Communications Management PDF</a></div>
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<div><a href="../rzahj/rzahjovr.htm">APPC, APPN, and HPR</a></div>
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<div><a href="../rzai2/rzai2kickoff.htm">TCP/IP setup</a></div>
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</div>
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</div>
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</body>
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</html>
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