Slow Performance of DataPump Export during Estimate Phase

(Doc ID 1354535.1)

Last updated on MAY 02, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 11.2.0.3 [Release 10.2 to 11.2]
Information in this document applies to any platform.

Symptoms

You started an Export DataPump job in a large database and observed a performance problem where the export job was apparently hanging for a long time at the step:

Estimate in progress using BLOCKS (or STATISTICS) method...
Processing object type DATABASE_EXPORT/SCHEMA/TABLE/TABLE_DATA

This problem is handled in several internal defects, which have different root causes.

 

Changes

 

Cause

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