what does the item's 'age' stat mean?

[John.H]

Thanks Steve
but I still do not understand that I set all the item's expire time to '0'
so,why these age will be such that stat?
Does the following stats
  STAT items:1:number 12
  STAT items:1:age 5904
mean:
the slab whose classid is  1 have  12 items
and this slab's next expire item will be expire in 5904 seconds?
Is this right?
I can not sure about it.

Help me more,thanks again

2007/8/4, Steven Grimm <sgrimm at facebook.com>:
>
> 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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