How to solve could not create the virtual machine error of Java Virtual Machine Launcher?

How to solve could not create the virtual machine error of Java Virtual
Machine Launcher?

I am working on java wicket framework and Apache tomcat. Here I have
Problem when i tried
to start tomcat it shows Java Virtual Machine Launcher pop window "Could
not create the
Java Virtual Machine".
After clicking on "OK" button on Pop window it shows the error on console.
Error occurred during initialization of VM.
Could not reserve enough space for object heap.
Please give me any reference or suggestions.
Thanks in Advance.