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POWhy does my Sun JVM fail to initialize when I set PermGen above 128M?
 

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  1. POWhy does my Sun JVM fail to initialize when I set PermGen above 128M?
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    <p>I need to increase my PermGen. Currently I pass the following as command line parameters:</p> <p><code>-XX:PermSize=128m -XX:MaxPermSize=128m</code></p> <p>This works. If I try to increase the values, however, my JVM fails to initialize, giving me this error:</p> <p><code>[2009-06-18 01:39:44] [info] Error occurred during initialization of VM [2009-06-18 01:39:44] [info] Could not reserve enough space for object heap [2009-06-18 01:39:44] [info] [2009-06-18 01:39:44] [395 javajni.c] [error] CreateJavaVM Failed</code></p> <p>Specifically, I'm trying to boot up <em>Tomcat</em> in the included <em>JRE6</em>, but I don't think this should matter.</p> <p><strong>Edit:</strong> I'm running Win2k3 VM image with 2GB of RAM. I boot the JVM using the <em>Monitor Tomcat</em> application with the following parameters:</p> <p>Initial memory pool: <strong>1024</strong>, maximum memory pool: <strong>1536</strong></p> <p><code>-XX:PermSize=128m -XX:MaxPermSize=128m -XX:+CMSPermGenSweepingEnabled -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -Dcatalina.home=C:\Program Files\Apache Software Foundation\Tomcat 6.0 -Dcatalina.base=C:\Program Files\Apache Software Foundation\Tomcat 6.0 -Djava.endorsed.dirs=C:\Program Files\Apache Software Foundation\Tomcat 6.0\endorsed -Djava.io.tmpdir=E:\tomcat\temp -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=C:\Program Files\Apache Software Foundation\Tomcat 6.0\conf\logging.properties </code></p>
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      1. USDavid Rabinowitz
 

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