Page Replacement Policy
In Buffer Management and Page
# LRU
# Clock Algorithm
Use a ref bit (recently referenced) in the metadata table and a clock hand variable to track the current frame in consideration.
If there is a ref bit, clear it. If not, evict it.
# MRU
measured by when the page’s pin count was last decremented.
# OPT
chooses the one that won’t be used for the longest time in the future.