DataPump Export Is Extremely Slow For Schema With Partitioned Tables (Doc ID 1515434.1)

Last updated on MAY 31, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 and later
Information in this document applies to any platform.
***Checked for relevance on 31-May-2017***

Symptoms

DataPump export (EXPDP) is very slow while exporting partitions. There were three separate exports of three schemas. The export for the schema with two strongly partitioned tables performs extremely slow after the database was upgraded to 11.2.0.3.

The trace obtained with event 10046 shows:

********************************************************************************
SQL ID: 7wn3wubg7gjds Plan Hash: 0

BEGIN :1 := sys.kupc$que_int.get_status(:2, :3); END;

call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        0      0.00       0.00          0          0          0           0
Execute    679     12.82    3347.27          0       3934          0        1358
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total      679     12.82    3347.27          0       3934          0        1358

Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: SYS   (recursive depth: 1)

Elapsed times include waiting on following events:
 Event waited on                             Times   Max. Wait  Total Waited
 ----------------------------------------   Waited  ----------  ------------
 wait for unread message on broadcast channel
                                              3412        1.05       3327.45
********************************************************************************

A bug has been mentioned in <Note 1300895.1> but that is fixed in 11.2.0.2.

Changes

The database was upgraded to 11.2.0.3.

Cause

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