Each time a procedure requests memory, the operating system allocates one or more page frames to the procedure and maps the process’s sensible webpages to your Bodily webpage frames. P R = V two × I = V R R + R C × V R + R C = R R + R C × V 2 R + R C = R R + R C P V displaystyle P_ R =V_ 2 occasions I=V frac R R+R_ C occasions frac V R+R_ C