-export CATALINA_BASE=/var/lib/tomcat
-export CATALINA_OPTS="-Xmx384M -XX:MaxPermSize=192m -XX:PermSize=128m"
-export JAVA_HOME=$(. /usr/share/java-utils/java-functions; set_jvm >&2; echo "$JAVA_HOME")
+# Java runtime options used when starting Tomcat
+#CATALINA_OPTS="-Xmx384M -XX:MaxPermSize=192m -XX:PermSize=128m"
+
+# Enable log4j configuration
+#CATALINA_OPTS="$CATALINA_OPTS -Dlog4j.configuration=file:///etc/tomcat/log4j.properties"
+
+# Disable slow urandom. Not recommended!
+# http://stackoverflow.com/questions/137212/how-to-solve-performance-problem-with-java-securerandom
+#CATALINA_OPTS="$CATALINA_OPTS -Djava.security.egd=file:/dev/./urandom"
+
+# Start Tomcat with SecurityManager
+#SECURITY_MANAGER="yes"
+
+# Enable SecurityManager debugging
+# WARNING - This will generate many megabytes of output!
+#SECURITY_MANAGER_DEBUG="all"
+
+# Java Development Kit installation
+#JAVA_HOME=""