资料来源 : Free On-Line Dictionary of Computing
least recently used
(operating systems) (LRU) A rule used in a {paging} system
which selects a page to be {paged out} if it has been used
(read or written) less recently than any other page. The same
rule may also be used in a {cache} to select which cache entry
to {flush}.
This rule is based on {temporal locality} - the observation
that, in general, the page (or cache entry) which has not been
accessed for longest is least likely to be accessed in the
near future.
(1995-02-15)