Create index parallel nologging

alter table t1 nologging;
alter table t2 nologging;

create index T1_IDX on T1 (Field1, Field2, Field3, Field4) parallel 2 nologging;
create index T2_IDX on T2 (Field1, Field2, Field3, Field4) parallel 2 nologging;

parallel 2 for 2 CPUs.