In order to increase memory limit for Java, perform the following steps, edit the file:
/var/cpanel/tomcat.options
Insert the following 2 lines:
Xmx200M
Xms100M
where, Xmx is the upper limit and Xms is the lower limit. You have to replace the values as per your requirement. Save the file and restart the tomcat service:
root@server [~]#/scripts/restartsrv tomcat
Howto: Increase RAM/Memory for Java.