#include <db.h> int DB_ENV->get_blob_threshold(DB_ENV *dbenv, u_int32_t *bytes);
         The DB_ENV->get_blob_threshold() method
         returns the threshold value, in bytes, beyond which data items are
         stored as BLOBs. This value can be set using
         DB_ENV->set_blob_threshold(). A value of 0 indicates
         that BLOBs are not in use by default in this environment, unless
         DB->set_blob_threshold() is called to set a BLOB threshold for a
         specific database.
    
         The DB_ENV->get_blob_threshold() method always
         returns 0 to indicate success.