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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <title>Tuning SQL Statements</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-05-27T15:13:1Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Tuning SQL Statements" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10822-01" /> <link rel="copyright" href="./dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="./dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="prev" href="tdppt_method010.htm" title="Previous" type="text/html" /> <link rel="next" href="tdppt_method012.htm" title="Next" type="text/html" /> <script src="./callback.js" type="text/javascript"></script> <noscript>Your browser does not support JavaScript. This help page requires JavaScript to render correctly.</noscript> </head> <body> <div class="zz-skip-header"><a href="#BEGIN">Skip Headers</a></div> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="tdppt_method010.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdppt_method012.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CIHJJADE" name="CIHJJADE"></a><a id="TDPPT494" name="TDPPT494"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1>Tuning SQL Statements</h1> <a name="BEGIN" id="BEGIN"></a> <p>This section lists and describes the steps required to identify, tune, and optimize high-load SQL statements.</p> <p class="orderedlisttitle">To tune SQL statements<a id="sthref45" name="sthref45"></a><a id="sthref46" name="sthref46"></a>: </p> <ol> <li> <p>Identify high-load SQL statements, as described in <a href="tdppt_sqlid.htm#BABFHBFJ">Identifying High-Load SQL Statements</a>.</p> <p>Use the ADDM findings and the Top SQL section to identify high-load SQL statements that are causing the greatest contention.</p> </li> <li> <p>Tune high-load SQL statements, as described in <a href="tdppt_sqltune.htm#CAEBFCFJ">Tuning SQL Statements</a>.</p> <p>You can improve the efficiency of high-load SQL statements by tuning them using SQL Tuning Advisor.</p> </li> <li> <p>Optimize data access paths, as described in <a href="tdppt_sqlopt.htm#BABGHCAE">Optimizing Data Access Paths</a>.</p> <p>You can optimize the performance of data access paths by creating the proper set of <a id="sthref47" name="sthref47"></a>materialized views, <a id="sthref48" name="sthref48"></a>materialized view logs, and <a id="sthref49" name="sthref49"></a>indexes for a given workload by using SQL Access Advisor.</p> </li> <li> <p>Analyze the SQL performance impact of SQL tuning and other system changes by using SQL Performance Analyzer.</p> <p>To learn how to use SQL Performance Analyzer, see <a href="topicid:RATUG166">Introduction to SQL Performance Analyzer</a>.</p> </li> <li> <p>Repeat these steps until all high-load SQL statements are tuned for greatest efficiency.</p> </li> </ol> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdppt_method007.htm#CIHFFHBI">Using the Oracle Performance Method</a></p> </div> </div> <!-- class="sect2" --> <!-- class="sect1" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 2007, 2009, Oracle and/or its affiliates. All rights reserved.</span><br /> <a href="./dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td> <td align="center"><a href="tdppt_method010.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdppt_method012.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> </div> <!-- class="footer" --> </body> </html>
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