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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 APRIL 24, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.2.0.1 [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.

Symptoms

+ 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.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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