EXPDP is Slow While Updating Master Table after Upgrade to 12.2.0.1
(Doc ID 2326998.1)
Last updated on MAY 20, 2021
Applies to:
Oracle Database - Enterprise Edition - Version 12.2.0.1 to 12.2.0.1 [Release 12.2]Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
NOTE: The document content below, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.
Symptoms
In 12.1.0.2, after applying <Patch 21554480> (a merge of multiple Data Pump performance fixes), Data Pump Export (expdp) completes in, say, 13 minutes. However, after upgrading to 12.2.0.1, the same expdp takes >2 hours to complete.
(Note: All fixes in <Patch 21554480> are included in 12.2.)
An Automatic Workload Repository (AWR) report shows:
These show that a lot of time was spent updating the master table.
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| References |