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Datapump Import is Very Slow in 12c with Large Number of Object Grants (Doc ID 2069397.1)

Last updated on FEBRUARY 26, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 12.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud 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
Information in this document applies to any platform.


For certain expdp dump file, Datapump import (impdp) into 11g took 3 hours compared to 7 hours in 12c.

There are many Grants to be imported and much time is used for OBJECT_GRANT and INDEX objects, e.g.

"Completed 302872 OBJECT_GRANT objects in 18468 seconds"
"Completed 6962 INDEX objects in 16470 seconds"

In the AWR report, next code is being run over and over many times:



DataPump Import (impdp) ran fine in 11g but this is happening in 12c.


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