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POJboss slows down after a while
 

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    <p>In a nutshell: my JBoss instance is running ok, but after some days it's performance is slowly degrading.</p> <p>Detailed: I've got a setup with JBoss 5.1.0-GA and Java 1.6.0_18-b07 (x64) running on a 64 bits RHEL 4 box. The hardware is a virtual machine with 8 core Xeon X5550 / 20G ram.</p> <p>The product deployed in JBoss contains a webservice on which a endurance test is performed. No database is involved in the process.</p> <p>The tests are performed using soapui with 4 threads and the tests are configured to create 20% cpu usage.</p> <p>Let say, at first the average response times are 300ms. After 2 days, the response times are now 600ms, which I don't understand. Of course I did some checks:</p> <ul> <li>There are no memory leaks (confirmed with jprofiler)</li> <li>Heap mem is always around 25-50%, perm space usage is 50%</li> <li>GC is almost never busy</li> <li>All threads are idle after inspecting a thread dump</li> </ul> <p>While do some further investigations, I did a cpu profile with JProfiler at the beginning (when it's still fast), and on on the (slow) end. What I see then, is that every single call just is 100% slower! Even call's to a simple Map#put(). (the # of invocations and the content of these maps are the same). When running a profiler, there are no signs of blocked threads, just running threads.</p> <p>Does anyone has a clue what's causing the performance degradation? Thanks!</p> <p><hr/> <strong>Update:</strong> solved the performance degradation by upgrading the Java version to 1.6.0_24 !</p> <p>While out of options, I scanned through all the release notes of the java vm, and discovered a performance and reliability fix in 1.6.0_23. See also the <a href="http://www.oracle.com/technetwork/java/javase/6u23releasenotes-191058.html">1.6.0_23 release notes</a></p> <p>After the jvm upgrade, the performance stays the same and does not degrade over days.</p>
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    1. USJan Hoeve
    1. USJan Hoeve
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      1. USLukasz Stelmach
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    1. COCongrats - you may post your "update" as answer and then accept this later on as good answer.
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      1. USHeiko Rupp
 

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