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Undo Continuously Growing And Not Releasing Active Segments (Doc ID 1476614.1)

Last updated on JANUARY 29, 2022

Applies to:

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
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

An 11.1.0.7 Oracle database experiences the following behaviour: there exist active undo segments without actual transaction presence. 95-98% of undo space is consuming by ACTIVE undo segments, and consumed space continues to increase despite the absence of transactions. We have to increase tablespace size constantly.

Cause

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In this Document
Symptoms
Cause
Solution
References


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