Sets the maximum file size, in bytes, for a file to be mapped into the process address space. If no value is specified, it defaults to 10MB.
                 The syntax of this parameter in the DB_CONFIG file is
                 a single line with the string set_mp_mmapsize, 
                 one or more whitespace characters, 
				and the size in bytes.
            
For more information, see DbEnv::set_mp_mmapsize().