When the memory cache region becomes full, LRU removes the least recently used cached data first.

当内存缓存区域满时，lru会首先删除最近最少使用的缓存数据。

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Many servlet containers place a limit on the amount of memory that can be used across all sessions, and when that limit is reached, will serialize the least recently used session and write it to disk.

许多 servlet 容器对可以跨所有会话使用的内存的数量有一个限制，达到这个限制时，会序列化最先使用的会话并将它写到磁盘上。

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The first is that the Cache implements a least-recently-used algorithm, allowing ASP.NET to force a Cache purge—automatically removing unused items from the Cache—if memory is running low.

首先，缓存会实现最近最少使用的算法，使得 ASP.NET 能够在内存运行效率较低的情况下强制缓存清除——从缓存自动删除未使用过的项目。

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