Tomcat 7: How to set initial heap size correctly?

Use following command to increase java heap size for tomcat7 (linux distributions) correctly:

echo 'export CATALINA_OPTS="-Xms512M -Xmx1024M"' > /usr/share/tomcat7/bin/setenv.sh

You might no need to having export, just add this line in catalina.sh :

CATALINA_OPTS="-Xms512M -Xmx1024M"

You must not use =. Simply use this:

export CATALINA_OPTS="-Xms512M -Xmx1024M"