John.H wrote:
STAT items:33:number 100
STAT items:33:age 6150

And I want to know what does the age mean?

It is the age in seconds of the item that will expire next in each slab class. (A slab class is a range of item sizes, more or less, and each range maintains its own LRU queue.) Once your cache fills up, you can use the age stat to determine your cache's turnover rate.

-Steve

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