#include <db_cxx.h> int DbEnv::get_lg_regionmax(u_int32_t *lg_regionmaxp);
         The DbEnv::get_lg_regionmax() method returns the size of the
         underlying logging subsystem region.
         You can manage this value using the
         DbEnv::set_lg_regionmax()
         method. 
    
         The DbEnv::get_lg_regionmax() method may be called at any time
         during the life of the application.
    
         The DbEnv::get_lg_regionmax() 
            
            
                method either returns a non-zero error value or throws an
                exception that encapsulates a non-zero error value on
                failure, and returns 0 on success.