Intersegment concurrency can be used for concurrent loading of different objects. You can apply this technique to concurrent direct path loading of different tables, or to concurrent direct path loading of different partitions of the same table.
When you direct path load a single partition, consider the following items:
Local indexes can be maintained by the load.
Global indexes cannot be maintained by the load.
Referential integrity and CHECK constraints must be disabled.
Triggers must be disabled.
The input data should be partitioned (otherwise many records will be rejected, which adversely affects performance).