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 to [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 29-Jul-2013***


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.


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms