way to find average age of cache items being deleted by LRU algorithm?

[Bennett Haselton]

Is there a statistic that shows the average age of cache items that
are being deleted, once the cache is full and the LRU algorithm is
forcing some items to be deleted?

I looked in the output of "stats" but didn't see anything like that.

Bennett

[Clint Webb]

I dont think so, but that would actually be a very useful thing to know.



--
"Be excellent to each other"

[Dustin]

You can't get the average, but you can get the most recent, which is
generally close enough. See "age" in stats items. Note that it's per-
slab.

[dormando]

Actually, it's the 'evicted_time' stat, if the poster is asking about the
average age of items being evicted early? Otherwise the LRU is deleting
expired items. The average age matters a bit less there.

-Dormando