How to increase JVM memory allocation in Tomcat

Question

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How to tune Tomcat 5.5 JVM Memory settings without using the configuration program

I had a job hang in Tomcat 6.0.26 earlier and I suspect that I might need to increase the memory allocation the server is using. I have to admit though, I can find nothing in the logs to support this suspicion, but everything has worked to date and since the server was restarted.

The platform is Windows 7 64-bit and from what I can tell I need to amend variable:

JAVA_OPTS

In file

catalina.bat

The current server usage of the JVM is as follows:

Free memory: 54.08 MB Total memory: 134.31 MB Max memory: 227.56 MB

So, am I right in thinking that adjusting JAVA_OPTS will adjust the JVM properties? Should I be changing JAVA_OPTS here and in this manner in catalina.bat?

if not "%LOGGING_MANAGER%" == "" goto noJuliManager 
set LOGGING_MANAGER=-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager :noJuliManager 
set JAVA_OPTS=%    JAVA_OPTS% %LOGGING_MANAGER%

set JAVA_OPTS=%JAVA_OPTS% -Xms128m -Xmx512m -XX:MaxPermSize=128m

rem ----- Execute The Requested Command
---------------------------------------

To double the current allocation?

have you searched around? There are a lot of questions and forum threads showing that — Bozho, Dec 09 '11 at 13:16

score 2 · Answer 1 · answered Dec 09 '11 at 13:15

2

Try this

set JAVA_OPTS=%JAVA_OPTS% -Xms128m -Xmx512m -XX:MaxPermSize=128m

answered Dec 09 '11 at 13:15

subodh

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Tomcat themselves recommend setting CATALINA_OPTS instead. – Mr Morgan Dec 09 '11 at 14:59

How to increase JVM memory allocation in Tomcat

1 Answers1