If any particular block in the 4KB reusable-block is accessed by a request, it renews the threshold value of the
reusable-block. Victim blocks for each buffer are selected based on aminimum threshold
value to maximize temporal locality. The SDCB management table has a 64KB space,
and the DDCB management table has a 37KB space for buffer management, thus the
total space is less than 128KB