Hi Ajay,
es/implelmentation = std
1st of all, this parameter makes your task bit easy. This makes sure Linux follows the standard Linux memory management. Here all the user contexts in system are mapped to the addressing space which is only possible in 64 bit systems as these systems can have huge memory configured which can be addressed at system level because of combination using 64 digit binary number.
allocation sequence will change
2nd point is, yes it would. I would suggest you to read below help section for more.
Allocating Memory for User Contexts (UNIX) - SAP Memory Management (BC-CST-MM) - SAP Library
Regards,