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List: jboss-user
Subject: [jboss-user] [Performance Tuning] - Re: JBoss performance decrease
From: Peter Johnson <do-not-reply () jboss ! com>
Date: 2011-02-28 15:02:41
Message-ID: 2-589983-3-81701-1298884035882-2-590106-3-2143-1298905348978.jivesbs.jivemailuser () http://community ! jboss ! org
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Peter Johnson [http://community.jboss.org/people/peterj] created the discussion
"Re: JBoss performance decrease"
To view the discussion, visit: http://community.jboss.org/message/590106#590106
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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.
For suggestions on how to gather GC data and analyze it,see these white papers:
Java Garbage Collection Statistical Analysis 101
Java Garbage Collection Performance Analysis 201
at 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
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17px; font-weight: normal;"> Re: JBoss performance decrease
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<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">ht \
tp://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>
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