The persistent configuration settings for RMAN have default for all parameters.

BACKUP TABLESPACE SYSTEM SECTION SIZE 100M;

BACKUP AS COPY TABLESPACE SYSTEM SECTION SIZE 100M;

BACKUP ARCHIVELOG ALL SECTION SIZE 25M;

BACKUP TABLESPACE "TEMP" SECTION SIZE 10M;

BACKUP TABLESPACE "UNDO" INCLUDE CURRENT CONTROLFILE SECTION SIZE 100M;

BACKUP SPFILE SECTION SIZE 1M;

BACKUP INCREMENTAL LEVEL 0 TABLESPACE SYSAUX SECTION SIZE 100M;