Why DataPump Does Not Use Parallelism When Importing An IOT?
(Doc ID 2234596.1)
Last updated on MARCH 27, 2019
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
An Import DataPump job of an unpartitioned Index-Organized Table does not use parallelism when importing the table data. As a result, a slow performance is observed when importing IOT table data. The IOT does not have a physical rowed mapping table nor a materialized view on it:
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