1. A method comprising: determining, at a cache manager, an amount of accessible data for a portion of a cache associated with the cache manager; comparing the amount of accessible data to a threshold value; determining, for one or more clients associated with the cache manager, an amount of releasable data if the amount of accessible data exceeds the threshold value; communicating, to one or more clients associated with the cache manager, the amount of releasable data for the respective client; receiving. from one or more clients associated with the cache manager, information associated with data released by the one or more clients; determining, at the cache manager, an amount of data released by the one or more clients associated with the cache manager.