Datapump Import (IMPDP) With TABLE_EXISTS_ACTION=TRUNCATE Is Slower When Table Exists
(Doc ID 780784.1)
Last updated on MARCH 08, 2019
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
NOTE: In the images and/or the document content below, the user information and data used represents fictitious data. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.
DataPump import (IMPDP) on 10gR2 takes more time when an Index Organized table exists and if you specify TABLE_EXISTS_ACTION=TRUNCATE.
The slower performance is not seen when you drop the table and import it. Example:
Measure the time (performance) and you will see this time Import (DataPump Import) is faster.
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