#include <db.h> int DB_ENV->get_lg_regionmax(DB_ENV *dbenv, u_int32_t *lg_regionmaxp);
         The DB_ENV->get_lg_regionmax() method returns the size of the
         underlying logging subsystem region.
         You can manage this value using the
         DB_ENV->set_lg_regionmax()
         method. 
    
         The DB_ENV->get_lg_regionmax() method may be called at any time
         during the life of the application.
    
         The DB_ENV->get_lg_regionmax() 
            
                  method returns a non-zero error value on failure and 0 on success.