LRU is an acronym that can contain many meanings which are listed below.
LRU – Least Recently Used
There may be many popular meanings for LRU with the most popular definition being that of Least Recently Used
More LRU Definitions
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simply remove the block least recently referenced.
This can be improved upon for database applications
The Least Recently Used (LRU) policy takes advantage of the heuristic that pages which have been accessed recently are more likely to be accessed again. Thus, this policy always replaces the page which has been in primary memory the longest without being accessed. One example of why this policy is effective is that “programs are written to contain loops, which cause the main line of the code to execute repeatedly, with special case code rarely being executed.” [Nutt 1997]. The pages which contain the code for the loop are likely to be accessed repeatedly.