which datas will store in onchip sram..... please help me
No. We can't.
There are no magic rule.
Your settings will control where things are stored.
You haven't even remembered to tell us what processor you are using.
But for many chips, you will not have access to external RAM until you have configured the memory controller to tell amount, type, speed etc of the external RAM.
http://www.keil.com/support/man/docs/gsac/
http://www.keil.com/support/man/docs/uv4/