according to the help on the N/cache options.ttl: The maximum duration, in seconds, that a value retrieved by the loader can remain in the cache. Note that the value may be removed before the ttl limit is reached. The default ttl value is no limit. The minimum value is 300 (five minutes). ImportantA cached value is not guaranteed to stay in the cache for the full duration of the ttl value. The ttl value represents the maximum time that the cached value may be stored.