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

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.7 to 11.2.0.3 [Release 11.1 to 11.2]
Information in this document applies to any platform.
*** Checked for relevance on 12-Apr-2016 ***

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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