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Does anyone know or know how to find the default values for the various memory allocation-related parameters (-Xms, -Xms, -XX:PermSize, -XX:MaxPermSize) for Tomcat version 6?

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up vote 1 down vote accepted

As far as I can tell the defaults should be the same as for any server JVM. Are you using the default Sun/Oracle JDK, version 6?

If so you could check the default values here:

http://download.oracle.com/javase/6/docs/technotes/tools/windows/java.html

http://download.oracle.com/javase/6/docs/technotes/guides/vm/gc-ergonomics.html

Of course, if this particular Tomcat install is new to you remember to check the actual JVM parameters using ps auxwwe (if using Linux) and its init scripts in case someone set CATALINA_OPTS or JAVA_OPTS, etc.

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