I wonder who this article is written for. Who would be reading about UUIDs but not know about cache hit rates? > As a result, retrieving the most recent data f

I wonder who this article is written for. Who would be reading about UUIDs but not know about cache hit rates? > As a result, retrieving the most recent data from a large dataset will require traversing a large number of database index pages, leading to a poor cache hit ratio (how many requests a cache is able to fill successfully, compared to how many requests it receives).