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90 lines
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HTML
90 lines
4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Performance Tuning</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Getting Started with Berkeley DB Transaction Processing" />
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<link rel="up" href="introduction.html" title="Chapter 1. Introduction" />
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<link rel="prev" href="recovery-intro.html" title="Recoverability" />
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<link rel="next" href="enabletxn.html" title="Chapter 2. Enabling Transactions" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.3</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Performance Tuning</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="recovery-intro.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 1. Introduction</th>
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<td width="20%" align="right"> <a accesskey="n" href="enabletxn.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="perftune-intro"></a>Performance Tuning</h2>
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</div>
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</div>
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</div>
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<p>
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From a performance perspective, the use of transactions is not free.
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Depending on how you configure them, transaction commits
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usually require your application to perform disk I/O that a non-transactional
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application does not perform. Also, for multi-threaded
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<span>and
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multi-process</span> applications, the use of transactions can
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result in increased lock contention due to extra locking
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requirements driven by transactional isolation guarantees.
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</p>
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<p>
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There is therefore a performance tuning component to transactional applications
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that is not applicable for non-transactional applications (although
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some tuning considerations do exist whether or not your application uses
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transactions). Where appropriate, these tuning considerations are
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introduced in the following chapters.
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<span>
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However, for a more complete description of them, see the
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<a class="ulink" href="http://download.oracle.com/docs/cd/E17076_02/html/programmer_reference/transapp_tune.html" target="_top">
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Transaction tuning
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</a>
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and
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<a class="ulink" href="http://download.oracle.com/docs/cd/E17076_02/html/programmer_reference/transapp_throughput.html" target="_top">
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Transaction throughput
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</a>
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sections of the <em class="citetitle">Berkeley DB Programmer's Reference Guide</em>.
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</span>
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</p>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="recovery-intro.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="introduction.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="enabletxn.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Recoverability </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Chapter 2. Enabling Transactions</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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