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<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>
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<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>
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