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 > 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
- (<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
+ (<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>
![http://goopen.org/confluence/images/icons/linkext7.gif"](http://goopen.org/confluence/images/icons/linkext7.gif"){kind=link}