PermGen空间问题

Question

Environment: Windows Server 2003 x86 Intel Xeon 2.3 4gb Ram | tomcat 7.0.27 | jdk 1.7.0.25

I am facing the OutOfMemoryError. SO suggests using java options to increase the permgen space using following options

-Djava.awt.headless=true -Dfile.encoding=UTF-8 -server -Xms1536m -Xmx1536m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m -XX:MaxPermSize=256m -XX:+DisableExplicitGC

However tomcat status page still shows the permgen memory as 64MB. Why cant it pick up the value specified in the parameters?

Answer 1

There is no PermGen in the status page, see this http://tomcat.apache.org/tomcat-7.0-doc/manager-howto.html#Introduction .

Anyways you conf seems OK

Since PermGen is a java thing (not tomcat) you should use java tools to check it, take a look at this .

Answer 2

As your settings seem ok, check the way you apply them: If you start tomcat via batch file, create setenv.bat with the content

  CATALINA_OPTS="-Dyour-settings-from-above ... all of them"

If you start a service, you'll need to update the service configuration - as I'm not on Windows, it's a long time since I did that. Did you use the tomcatw.exe to create/configure the service? Not sure...