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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>Guidelines for Managing Audited Information</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1" /> <meta name="date" content="2009-06-02T18:13:4Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Guidelines for Managing Audited Information" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10575-01" /> <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="tdpsg_auditing022.htm" title="Previous" type="text/html" /> <link rel="next" href="tdpsg_auditing024.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="tdpsg_auditing022.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdpsg_auditing024.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="i1010870" name="i1010870"></a><a id="TDPSG60682" name="TDPSG60682"></a></p> <div class="sect2"> <h1>Guidelines for Managing Audited Information</h1> <a name="BEGIN" id="BEGIN"></a> <p>Although <a id="sthref513" name="sthref513"></a><a id="sthref514" name="sthref514"></a>auditing has a minimal impact on database performance, limit the number of audited events as much as possible. This minimizes the performance impact on the execution of audited statements and the size of the audit trail, making it easier to analyze and understand.</p> <p>Follow these guidelines when devising an auditing strategy:</p> <ol> <li> <p><span class="bold">Evaluate your reason for auditing.</span></p> <p>After you understand of the reasons for auditing, you can devise an appropriate auditing strategy and avoid unnecessary auditing.</p> <p>For example, suppose you are auditing to investigate suspicious database activity. This information by itself is not specific enough. What types of suspicious database activity do you suspect or have you noticed? A more focused auditing purpose might be to audit unauthorized deletions from arbitrary tables in the database. This purpose narrows the type of action being audited and the type of object being affected by the suspicious activity.</p> </li> <li> <p><span class="bold">Audit knowledgeably.</span></p> <p>Audit the minimum number of statements, users, or objects required to get the targeted information. This prevents unnecessary audit information from cluttering the meaningful information. Balance your need to gather sufficient security information with your ability to store and process it.</p> <p>For example, if you are auditing to gather information about database activity, then determine exactly what types of activities you want to track, audit only the activities of interest, and audit only for the amount of time necessary to gather the information that you want. As another example, do not audit <span class="italic">objects</span> if you are only interested in logical I/O information for each session.</p> </li> </ol> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdpsg_auditing022.htm#CHDBEBEE">Guideline for Using Default Auditing of SQL Statements and Privileges</a></p> <p><a href="tdpsg_auditing025.htm#i1007822">Guidelines for Auditing Suspicious Database Activity</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 © 2006, 2009, Oracle and/or its affiliates. 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