IMPDP Performs Extremely Slow When Importing In Parallel Into An Existing Partitioned Table (Doc ID 952853.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 to 11.2.0.1 [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 29-Jul-2013***

Symptoms

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:

enq: TM - contention


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.

Cause

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