Why DataPump Does Not Use Parallelism When Importing An IOT?

(Doc ID 2234596.1)

Last updated on FEBRUARY 16, 2017

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.1 to 12.1]
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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