This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You can use the Java command line parameters to allocate more memory by setting the JAVA_OPTS parameter in catalina.bat - see the Java tooldocs for the format. I think we recently had an extended discussion of this here, so you might browse the last couple of weeks of posts. Bill