DataPump Import with REMAP_SCHEMA is Very Slow
(Doc ID 812864.1)
Last updated on JANUARY 30, 2022
Applies to:
Oracle Database - Enterprise Edition - Version 10.2.0.1 and laterOracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata 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: In the testcase content below, the user information and metadata used represents fictitious data. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.
Symptoms
You started a DataPump schema import with parameter REMAP_SCHEMA. This apparently hangs indefinitely on "TABLE/STATISTICS/TABLE_STATISTICS". You verified, the patch for <Bug 5071931> is installed but the import is still slow. If you exclude the statistics (EXCLUDE=STATISTICS) or do not use REMAP_SCHEMA, then import is very fast.
Changes
Cause
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In this Document
| Symptoms |
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| Cause |
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| References |