#include <db.h> int DB_ENV->get_data_len(DB_ENV *dbenv, u_int32_t *bytes);
         The DB_ENV->get_data_len() method returns
         the maximum number of bytes to display for each key/data item when
         dumping the database or printing the log.  This limit can be set
         using the
         DB_ENV->set_data_len()
         method.
    
         The DB_ENV->get_data_len() method may be called at any time during
         the life of the application.
    
         The DB_ENV->get_data_len() 
            
                  method returns a non-zero error value on failure and 0 on success.