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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>Preparing for Messaging</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-06-04T17:1:2Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Preparing for Messaging" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10703-01" /> <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="tdpii_messaging006.htm" title="Previous" type="text/html" /> <link rel="next" href="tdpii_messaging008.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="tdpii_messaging006.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdpii_messaging008.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CHDGIEEC" name="CHDGIEEC"></a><a id="TDPII033" name="TDPII033"></a></p> <div class="sect1"><!-- infolevel="all" infotype="General" --> <h1>Preparing for Messaging<a id="sthref581" name="sthref581"></a><a id="sthref582" name="sthref582"></a><a id="sthref583" name="sthref583"></a><a id="sthref584" name="sthref584"></a><a id="sthref585" name="sthref585"></a><a id="sthref586" name="sthref586"></a><a id="sthref587" name="sthref587"></a></h1> <a name="BEGIN" id="BEGIN"></a> <p>This topic describes actions that are required to prepare your databases for a messaging environment.</p> <p class="orderedlisttitle">To prepare your databases for a messaging environment: </p> <ol> <li> <p>Set the <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=REFRN10065','newWindow').focus()"><code>GLOBAL_NAMES</code></a> initialization parameter to <code>TRUE</code> at each database involved in the messaging environment. See <a href="tdpii_common_ii001.htm#BGBEEDCD">"Setting the GLOBAL_NAMES Initialization Parameter to TRUE"</a> for instructions.</p> </li> <li> <p>Configure network connectivity so that a database that sends messages can communicate with a database that receives messages. See <a href="topicid:ADMQS004">Configuring the Network Environment</a> for information about configuring network connectivity between databases.</p> </li> <li> <p>Configure an Oracle Streams administrator at each database involved in the messaging environment. See <a href="tdpii_common_ii002.htm#BGBHDJHF">"Tutorial: Configuring an Oracle Streams Administrator"</a> for instructions.</p> </li> <li> <p>Ensure that the Oracle Streams pool is large enough to accommodate the queues created for the messaging environment. Each queue requires at least 10 MB of memory. The Oracle Streams pool is part of the System Global Area (SGA). You can manage the Oracle Streams pool by setting the <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=REFRN10285','newWindow').focus()"><code>MEMORY_TARGET</code></a> initialization parameter (Automatic Memory Management), the <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=REFRN10256','newWindow').focus()"><code>SGA_TARGET</code></a> initialization parameter (Automatic Shared Memory Management), or the <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=REFRN10243','newWindow').focus()"><code>STREAMS_POOL_SIZE</code></a> initialization parameter. See <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=STREP202','newWindow').focus()"><span class="italic">Oracle Streams Replication Administrator's Guide</span></a> for more information about the Oracle Streams pool.</p> </li> </ol> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdpii_messaging001.htm#CHDIJFHB">About Messaging</a></p> <p><a href="tdpii_messaging008.htm#CHDBACBE">Tutorial: Sending Messages Between Oracle Databases</a></p> <p><a href="tdpii_messaging015.htm#CHDGEHCF">Tutorial: Configuring Message Notifications</a></p> </div> </div> <!-- 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. 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