Last updated on JUNE 06, 2017
Applies to:
Oracle Database - Enterprise Edition - Version 9.2.0.1 to 12.2.0.1 [Release 9.2 to 12.2]Information in this document applies to any platform.
Symptoms
After upgrading a database to 11gR2 or 12c using the Database Upgrade Assistant (DBUA), any underscore (hidden) parameters that were previously set will no longer be set.
DBUA does not show any warning messages that these parameters will be lost after the upgrade.
Changes
Upgrade the database to 11gR2 or 12c using DBUA
Cause
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