<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<body link="#355491" alink="#4262a1" vlink="#355491" style="background: #e2e2e2; margin: 0; padding: 20px;">
<div>
<table cellpadding="0" bgcolor="#FFFFFF" border="0" cellspacing="0" style="border: 1px solid #dadada; margin-bottom: 30px; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" style="border: solid 2px #ccc; background: #dadada; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td bgcolor="#000000" valign="middle" height="58px" style="border-bottom: 1px solid #ccc; padding: 20px; -moz-border-radius-topleft: 3px; -moz-border-radius-topright: 3px; -webkit-border-top-right-radius: 5px; -webkit-border-top-left-radius: 5px;">
<h1 style="color: #333333; font: bold 22px Arial, Helvetica, sans-serif; margin: 0; display: block !important;">
<!-- To have a header image/logo replace the name below with your img tag -->
<!-- Email clients will render the images when the message is read so any image -->
<!-- must be made available on a public server, so that all recipients can load the image. -->
<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF" style="font: normal 12px Arial, Helvetica, sans-serif; color:#333333; padding: 20px; -moz-border-radius-bottomleft: 4px; -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 5px; -webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: 17px; font-weight: normal;">
Re: JBoss performance decrease
</h3>
<span style="margin-bottom: 10px;">
created by <a href="http://community.jboss.org/people/peterj">Peter Johnson</a> in <i>Performance Tuning</i> - <a href="http://community.jboss.org/message/590106#590106">View the full discussion</a>
</span>
<hr style="margin: 20px 0; border: none; background-color: #dadada; height: 1px;">
<div class="jive-rendered-content"><p>I see that for the first hour, things go along just fine, then rapidly deteriorate. It would appear that your working set size is gretaer than 600MB, and with the heap settings you have, once you reach 600MB in the old generattion the JVM will perform only major collections and no minor collections. Wolf-Dieter's recommendation to log the GC data and then also analyze it is a good one. You will probably have to increase your heap size. I assume you are running a 32-bit OS in which case you will be limited to about a 1.5GB heap.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>For suggestions on how to gather GC data and analyze it,see these white papers:</p><p>Java Garbage Collection Statistical Analysis 101</p><p>Java Garbage Collection Performance Analysis 201</p><p>at <a class="jive-link-external-small" href="http://www.cmg.org/cgi-bin/search.cgi?q=java+peter+johnson&x=30&y=10">http://www.cmg.org/cgi-bin/search.cgi?q=java+peter+johnson&x=30&y=10</a></p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/590106#590106">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in Performance Tuning at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2078">Community</a></p>
</div></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>