Memcache limit memory is exhausted, will the new entry be removed from the old unexpired item? What to do with it?

When the memcache limit memory is exhausted, will the new entry be removed from the old unexpired item?
When the memcache limit memory is exhausted, will the new entry be removed from the old unexpired item? Or how to deal with it?

For example, everyone is not expired, that is, the effective cache time, more than the maximum use of memory, such as 100m, added items, is not advanced first out of such?

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LRU automatically clears the less recently used, and then overwrites the new.
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Memcache memory is allocated by the page, after the allocation of a page and then divided into more small pieces, the consequences of this, recycling is also by page recycling, so often will not necessarily "old" things also to recycling, so there will be a hit problem, if your server available memory is very small, Or do not use the memcache, you can consider the use of file-type hash cache class
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Http://hi.baidu.com/joysoftfan/blog/item/e6deaae459d7ae3ab9382035.html

Google a bit, and then wrote a script to test the next, indeed as 2L said

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