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rated 0 times [  2] [ 0]  / answers: 1 / hits: 5854  / 2 Years ago, tue, april 5, 2022, 2:08:58

I've a Tomcat 6 installation in Ubuntu 10.04 and wanting to increase Java Heap space, I went to /etc/default/tomcat6 and uncommented and changed the following line:



JAVA_OPTS="-Djava.awt.headless=true -Xmx1024m"


However, when I went to the Tomcat Manager Status page, I read:



JVM

Free memory: 125.29 MB Total memory: 382.43 MB Max memory: 510.43 MB


So I went to check my /etc/init.d/tomcat6 script and added echo $TOMCAT_SH, just before start-stop-daemon --start, to check that the variable actually went through, and I got:



# /etc/init.d/tomcat6 start

* Starting Tomcat servlet engine tomcat6

'set -a; JAVA_HOME="/usr/lib/jvm/java-6-openjdk"; source "/etc/default/tomcat6"; CATALINA_HOME="/usr/share/tomcat6"; CATALINA_BASE="/var/lib/tomcat6"; JAVA_OPTS="-Djava.awt.headless=true -Xmx1024m -XX:+UseConcMarkSweepGC -Djava.net.preferIPv4Stack=true"; CATALINA_PID="/var/run/tomcat6.pid"; CATALINA_TMPDIR="/tmp/tomcat6-tmp"; LANG="en_GB"; JSSE_HOME="/usr/lib/jvm/java-6-openjdk/jre/"; cd "/var/lib/tomcat6"; "/usr/share/tomcat6/bin/catalina.sh" start'

...done.


Which looks OK, so I was wondering why Tomcat manager says I've only 510Mb of max memory.



How can I make sure that the memory setting has been applied?


More From » 10.04
 Answers
1

I am setting Java Options in my .profile file (right under /home/yourUserName/) globally.



All Java Processes will start with this params as long as you start them as your current user (not sudo)



just add



## set Java Options for the JVM

export _JAVA_OPTIONS="-Xmx1024m -Xms512m -XX:MaxPermSize=256m"


to the end of the .profile file,



Another possibility: Put the export at the beginning of a tomcat start script. should work also.



i.e.



#!/bin/bash

## set Java Options for the JVM

export _JAVA_OPTIONS="-Xmx1024m -Xms512m -XX:MaxPermSize=256m"



##start Tomcat

/etc/init.d/tomcat6 start

[#36036] Wednesday, April 6, 2022, 2 Years  [reply] [flag answer]
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