security.earlybinding.user-to-key-mapper.cache-seconds (collection.cfg setting)
This parameter is used with early-binding security. It sets the amount of time a given list of keys for a user may remain cached without being looked up from the repository, thus avoiding slowing the search interface down unnecessarily.
The value may be set to zero to disable caching of security information, though this is not recommended for high performance search services.
Allow security information to be cached for ten minutes before it is retrieved from the repository again.