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RMAN backup warning errors ORA-19883 and ORA-19864 explanation (Doc ID 1982992.1)

Last updated on FEBRUARY 17, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.1 to 11.2]
Oracle 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.
RMAN not using Unused Block Compression/Optimization during backup.


 ORA-19883 and ORA-19864 errors seen in the alert.log file of the database when an RMAN backup is taken with "Unused Block Optimization".


 This usually happens when RMAN is taking a backup of a bigfile tablepace and that tablespace has reached certain size, usually after reaching more than 2.5Tb, but some customer have seen those errors only when the bigfile is more than 4TB.


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