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From jstrac...@apache.org
Subject svn commit: r413429 - in /incubator/activemq/site: using-activemq.html what-is-the-prefetch-limit-for.html
Date Sun, 11 Jun 2006 09:19:21 GMT
Author: jstrachan
Date: Sun Jun 11 02:19:21 2006
New Revision: 413429

URL: http://svn.apache.org/viewvc?rev=413429&view=rev
Log:
Latest export from confluence

Modified:
    incubator/activemq/site/using-activemq.html
    incubator/activemq/site/what-is-the-prefetch-limit-for.html

Modified: incubator/activemq/site/using-activemq.html
URL: http://svn.apache.org/viewvc/incubator/activemq/site/using-activemq.html?rev=413429&r1=413428&r2=413429&view=diff
==============================================================================
--- incubator/activemq/site/using-activemq.html (original)
+++ incubator/activemq/site/using-activemq.html Sun Jun 11 02:19:21 2006
@@ -258,10 +258,10 @@
               <a href="javascript:hideChildren()">Hide Children</a></span>
           </div>
           <div class="greybox" id="children" style="display: none;">
-                                      <a href="http://goopen.org/confluence/display/ACTIVEMQ/How+can+I+enable+detailed+logging"
title="How can I enable detailed logging">How can I enable detailed logging</a>
+                                      <a href="http://goopen.org/confluence/display/ACTIVEMQ/How+do+I+embed+a+Broker+inside+a+Connection"
title="How do I embed a Broker inside a Connection">How do I embed a Broker inside a Connection</a>
               <span class="smalltext">(ActiveMQ)</span>
               <br>
-                          <a href="http://goopen.org/confluence/display/ACTIVEMQ/How+do+I+embed+a+Broker+inside+a+Connection"
title="How do I embed a Broker inside a Connection">How do I embed a Broker inside a Connection</a>
+                          <a href="http://goopen.org/confluence/display/ACTIVEMQ/How+can+I+enable+detailed+logging"
title="How can I enable detailed logging">How can I enable detailed logging</a>
               <span class="smalltext">(ActiveMQ)</span>
               <br>
                           <a href="http://goopen.org/confluence/display/ACTIVEMQ/How+can+I+make+ActiveMQ+faster"
title="How can I make ActiveMQ faster">How can I make ActiveMQ faster</a>

Modified: incubator/activemq/site/what-is-the-prefetch-limit-for.html
URL: http://svn.apache.org/viewvc/incubator/activemq/site/what-is-the-prefetch-limit-for.html?rev=413429&r1=413428&r2=413429&view=diff
==============================================================================
--- incubator/activemq/site/what-is-the-prefetch-limit-for.html (original)
+++ incubator/activemq/site/what-is-the-prefetch-limit-for.html Sun Jun 11 02:19:21 2006
@@ -157,6 +157,7 @@
 	<LI><A href="visualisation.html" title="Visualisation">Visualisation</A></LI>
 	<LI><A href="kaha-persistence.html" title="Kaha Persistence">Kaha Persistence</A></LI>
 	<LI><A href="async-sends.html" title="Async Sends">Async Sends</A></LI>
+	<LI><A href="jmsxuserid.html" title="JMSXUserID">JMSXUserID</A></LI>
 	<LI><A href="changes-in-40.html" title="Changes in 4.0">Other new features</A></LI>
 </UL>
 
@@ -217,6 +218,7 @@
 	<LI><A href="wire-protocol.html" title="Wire Protocol">Wire Protocol</A></LI>
 	<LI><A href="developer-guide.html" title="Developer Guide">Developer Guide</A></LI>
 	<LI><A href="becoming-a-committer.html" title="Becoming a committer">Becoming
a committer</A></LI>
+	<LI><SPAN class="nobr"><A href="http://ci.gbuild.org/continuum/" title="Visit
page outside Confluence" rel="nofollow">GBuild<SUP><IMG class="rendericon" src="http://goopen.org/confluence/images/icons/linkext7.gif"
height="0" width="0" align="absmiddle" alt="" border="0"></SUP></A></SPAN></LI>
 	<LI><A href="integration-tests.html" title="Integration Tests">Integration Tests</A></LI>
 	<LI><A href="activemq-performance-module-users-manual.html" title="ActiveMQ Performance
Module Users Manual">Maven2 Performance Plugin</A></LI>
 	<LI><A href="benchmark-tests.html" title="Benchmark Tests">Benchmark Tests</A></LI>
@@ -242,8 +244,7 @@
 <!--          
             <div class="pagetitle">What is the prefetch limit for</div>
 -->
-            <DIV class="wiki-content">
-<P>One of the aims of ActiveMQ is to be a high performance message bus. This means
using a <A href="seda.html" title="SEDA">SEDA</A> architecture to perform as much
work as possible asynchronously. To be able to acheive high performance it is important to
stream messages to consumers as fast as possible so that the consumer always has a buffer
of messages, in RAM, ready to process - rather than have them explicitly pull messages from
the server which adds significant latency per message.</P>
+            <DIV class="wiki-content"><P>One of the aims of ActiveMQ is to be
a high performance message bus. This means using a <A href="seda.html" title="SEDA">SEDA</A>
architecture to perform as much work as possible asynchronously. To be able to acheive high
performance it is important to stream messages to consumers as fast as possible so that the
consumer always has a buffer of messages, in RAM, ready to process - rather than have them
explicitly pull messages from the server which adds significant latency per message.</P>
 
 <P>There is a danger however that this aggressive pushing of messages to the consumers
could flood a consumer as typically its much faster to deliver messages to the consumer than
it often is to actually process them.</P>
 
@@ -271,7 +272,9 @@
 consumer = session.createConsumer(queue);</PRE>
 </DIV></DIV>
 
-</DIV>
+<H3><A name="Whatistheprefetchlimitfor-RamversuspPerformancetradeoff"></A>Ram
versus pPerformance tradeoff</H3>
+
+<P>Setting a relatively high value of prefetch leads to higher performance; so the
default values are typically &gt; 1000; usually higher for topics and higher for the non-persistent
messaging. The prefetch size dictaces how many messages will be held in RAM on the client
so if your RAM is limited you may want to set a low value such as 1 or 10 etc.</P></DIV>
           
                   </DIV>
         </TD>
@@ -281,8 +284,8 @@
     </DIV>
     <DIV id="site-footer">
           Added by     <A href="http://goopen.org/confluence/users/viewuserprofile.action?username=jstrachan">James
Strachan</A>,
-    last edited by     <A href="http://goopen.org/confluence/users/viewuserprofile.action?username=chirino">Hiram
Chirino</A> on Mar 03, 2006
-                  &nbsp;(<A href="http://goopen.org/confluence/pages/diffpages.action?pageId=110&originalId=1547">view
change</A>)
+    last edited by     <A href="http://goopen.org/confluence/users/viewuserprofile.action?username=jstrachan">James
Strachan</A> on Jun 11, 2006
+                  &nbsp;(<A href="http://goopen.org/confluence/pages/diffpages.action?pageId=110&originalId=8687">view
change</A>)
               
       (<A href="http://goopen.org/confluence/pages/editpage.action?pageId=110">edit
page</A>)
     </DIV>



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