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LOB segment size is significantly increasing despite of small actual size of data in it (Doc ID 2326423.1)

Last updated on MARCH 08, 2023

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 12.1 to 12.2]
Oracle Database Cloud Schema 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
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.


+ A LOB segment is of size around few hundreds of GB when it is actually of around few hundred of MB only.

+ Also, 'enq: TX - contention' wait event is noticed in peak hours on the same LOB.




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