How to see when a variable is in the swap file and when in RAM?

Question

Operating Systems

I realized that you need to get the memory occupied by the process of the program in which the variable is located. But the fact is that I do not understand how this can be implemented in c ++.

Answer 1

From the program's point of view, all variables are in RAM. Unloading to the paging file is handled by the operating system transparently for application applications.

Answer 2

if you do not use the variable - it is in the swap file, if you access it - it is moved to RAM