IMPDP Performs Extremely Slow When Importing In Parallel Into An Existing Partitioned Table
(Doc ID 952853.1)
Last updated on JANUARY 30, 2022
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.4 to 188.8.131.52 [Release 10.2 to 11.2]
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.
When running IMPDP against an existing partitioned table with the TABLE_EXISTS_ACTION command line parameter set to TRUNCATE or APPEND and also using parallellism, the worker processes seem to be idle and waiting for the following event:
The problem does not occur when the table does not yet exist in the database, or when the IMPDP operation is run in serial mode.
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