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Redis内存回收策略，Rediskey失效机制

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Redis是基于内存的key-value数据库，内存的大小是有限制的，如果内存满了，Redis会怎么办呢，另外，我们可以通过expire设置key的过期时间，那么key过期失效了, Redis回收机制又是怎么样的呢？ 内存回收策略 最大内存...

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