PHP memcache — get the remaining time before deletion of record?

In memcached, when the memory is full, older objects are automatically deleted, so provide the time of removal — it is rather from the field of probability theory.

I have done so. In addition to the element with key "page_hash" with the page additional element with the key "page_hash.time" made, which sits right timestamp. But it is for manual processing, I memcache given a lot of memory, because the elements are displaced therefrom.