Assume you have the following:
Z—8 GB
m—100
t—4 years
Each year has 69 members (52 weeks, 12 months, 4 quarters, and 1 year); so, 4 years has a total of 276 members. Round this to 300.
r—0.5
You want only the blocks to occupy 50 percent of the total memory.
Plugging these numbers into the block cache size estimation equation:
c = (0.5 * 8 * 109) / (100 * 300 * 8)
results in a block cache size of 16667.