<?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="reference" /> <meta name="DC.Title" content="Improve distributed relational database performance through the network" /> <meta name="abstract" content="You can improve the performance of your network in various ways." /> <meta name="description" content="You can improve the performance of your network in various ways." /> <meta name="DC.subject" content="performance, improving through the network, network, improving performance through" /> <meta name="keywords" content="performance, improving through the network, network, improving performance through" /> <meta name="DC.Relation" scheme="URI" content="rbal1perform.htm" /> <meta name="DC.Relation" scheme="URI" content="../books/sc415406.pdf" /> <meta name="DC.Relation" scheme="URI" content="../rzahj/rzahjovr.htm" /> <meta name="DC.Relation" scheme="URI" content="../rzai2/rzai2kickoff.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="rbal1improve" /> <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>Improve distributed relational database performance through the network</title> </head> <body id="rbal1improve"><a name="rbal1improve"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Improve distributed relational database performance through the network</h1> <div><p>You can improve the performance of your network in various ways.</p> <div class="section"><p>Among them are the following ways: </p> <ul><li>Line speed</li> <li>Pacing</li> <li>Frame size</li> <li>RU sizing</li> <li>Connection type (nonswitched versus switched) <div class="p"> <div class="note"><span class="notetitle">Note:</span> Unprotected 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 (RUW) connection management</li> <li>If the program that is making the connection is not running under commitment control</li> <li>If the database to which the connection is made does not support two-phase commit for the protocol that is being used</li> </ul> If the characteristics of the data are such that the transaction only affects one database management system, establishing the connection from a program using RUW connection management or from a program running without commitment control can avoid the overhead associated with two-phase commit flows.</div> </div> <p>Additionally, when conversations are kept active with DDMCNV(*KEEP) and those conversations are protected conversations, two-phase commit flows are sent regardless of whether the conversation was used for DRDA or DDM processing during the unit of work. Therefore, when you run with DDMCNV(*KEEP), it is better to run with unprotected conversations if possible. If running with protected conversations, you should run with DDMCNV(*DROP) and use the RELEASE statement to end the connection and the conversation at the next commit when the conversation will not be used in future units of work.</p> </li> </ul> </div> </div> <div> <div class="familylinks"> <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> </div> <div class="relinfo"><strong>Related information</strong><br /> <div><a href="../books/sc415406.pdf " target="_blank">Communications Management PDF</a></div> <div><a href="../rzahj/rzahjovr.htm">APPC, APPN, and HPR</a></div> <div><a href="../rzai2/rzai2kickoff.htm">TCP/IP setup</a></div> </div> </div> </body> </html>