SQL backup utilizing more memory

Hi All,

SQL backup parent job completed successfully but child job not initiated.. we found error like memory ultization high in server, then we modified the script by

reducing MAXTRANSFERSIZE 6 to 1 then backup successfully. Anyone one tell me what is difference in keeping MAXTRANSFERSIZE 6 or 1 2 3..etc..

which is the best practice either MAXTRANSFERSIZE 6 or MAXTRANSFERSIZE 1....?? by keeping MAXTRANSFERSIZE 1 will the backup take long time to complete???