This read-only Gauge32, in bytes, indicates the total number of response bytes not stored in the cache for a particular preposition task in Akamai connected cache preposition operation. An admin uses this to see how much of a prepositioning task's fetched content couldn't be cached, perhaps due to cache-control policy on that content. A high uncacheable byte count for a preposition task would suggest that task's benefit is limited since much of what it fetched won't actually be served from cache later.