LRU(最近最少使用算法) and MRU(最近最常使用算法)所谓的LRU(Least recently used)算法的基本概念是:当内存的剩余的可用空间不够时,缓冲区尽可能的先保留使用者最常使用的数据,换句话说就是优先清除”较不常使用的数据”,并释放其空间-LRU (least recently used algorithm) and MRU (most recently used) algorithm called LRU ( Least recently used) algorithm is the basic concept : When the memory of the remaining available space is insufficient, the first buffer as possible to retain the most common users of the data used, In other words priority is to eliminate the "more rarely use the data," and the release of its space