DataPump Import Very Slow on Large Databases When Using SYSDBA for Import User
(Doc ID 2178916.1)
Last updated on MAY 18, 2021
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 and later
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 Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
When using DataPump Import on very large databases with many objects, the performance is very slow when the import user has the SYSDBA privilege, such as when using '/ AS SYSDBA'. Analysis shows that an update statement on the DataPump master table (e.g. SYS_IMPORT_FULL_01) is proceeding very slowly due to full table scans on this table. Indexes which should normally be created to support this table are not present.
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