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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>Monitoring Throughput</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="Monitoring Throughput" /> <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_realtime011.htm" title="Previous" type="text/html" /> <link rel="next" href="tdppt_realtime013.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_realtime011.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdppt_realtime013.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CBBIFFHE" name="CBBIFFHE"></a><a id="TDPPT325" name="TDPPT325"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1>Monitoring Throughput</h1> <a name="BEGIN" id="BEGIN"></a> <p>Database <span class="bold">throughput</span> measures the amount of work the database performs in a unit of time. The Throughput charts show any contention that appears in the Average Active Sessions chart. The Throughput charts on the Performance page<a id="sthref129" name="sthref129"></a><a id="sthref130" name="sthref130"></a> display:</p> <ul> <li> <p>Number of logons, transactions, physical reads, and redo size per second</p> </li> <li> <p>Number of physical reads and redo size per transaction</p> </li> </ul> <p>Compare the peaks on the Throughput charts with the peaks on the Average Active Sessions chart. If the Average Active Sessions chart displays a large number of sessions waiting, indicating internal contention, but throughput is high, then the situation may be acceptable. The database is probably also performing efficiently if internal contention is low but throughput is high. However, if internal contention is high but throughput is low, then consider tuning the database.</p> <p class="orderedlisttitle">To monitor throughput: </p> <ol> <li> <p>From the Database Home page, click <span class="bold">Performance</span>.</p> <p>The Performance page appears.</p> </li> <li> <p>In the instance activity chart, click <span class="bold">Throughput</span>.</p> <p>The Throughput charts are shown with <span class="bold">Instance Throughput Rate</span> set to the default value of <span class="bold">Per Second</span>. You can select <span class="bold">Per Transaction</span> to show the throughput rate per transaction.</p> </li> </ol> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdppt_realtime011.htm#CHDBEHAG">Monitoring Instance Activity</a></p> <p><a href="tdppt_realtime003.htm#CHDEFEEH">Monitoring Top Sessions</a></p> </div> </div> <!-- class="sect2" --> <!-- 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_realtime011.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdppt_realtime013.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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