What is one potential drawback of the least used (LRU) buffer replacement policy if it is...
What is one potential drawback of the least used (LRU) buffer replacement policy if it is used in database?
Homework Answers
The answer to the question is given
below.
In LRU, we know that the least recently used page is replaced when
the cache is full and the new referred page is not available in the
cache.
But it will behave poorly when there are repeated scans of big
data.
This is called SEQUENTIAL
FLOODING.
An example of sequential flooding is given below in the
image.
So, LRU is worst in the case of Sequential flooding. So, we can use
MRU for better performance in case of sequential flooding.
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