Setting up of Tomcat Heap Size in versions like 4.0

Earlier Version of Tomcat Like 4.*.* there is no GUI to set the JVM Heap Size in such cases u can set the Java Heap Size in following way
Set one variable in your System Enviornment as

VariableName:->JAVA_OPTS
VariableValue:-> -Xms64m -Xmx128m

This will solve ur heap size issue
If you r using catalina_home then u must define as CATALINE_OPTS as the above value....