Datapump DB Link Import Is Very Slow at Estimate Phase When PARALLEL_MAX_SERVERS>0
(Doc ID 392689.1)
Last updated on FEBRUARY 18, 2022
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 22.214.171.124 [Release 10.2 to 11.1]
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
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Database import via database link is extremely slow when PARALLEL_MAX_SERVERS > 0 is enabled in the source database. Actually, the situation is caused by the estimate phase itself and not by the actual import.
It could be that the same occurs only for the export operation.
Reproducing test case:
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