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IF: ORA-1628 Reported Even For Small Transactions Due to Auto Tuned UNDO_RETENTION (Doc ID 1951033.1)

Last updated on JANUARY 08, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.1 and later
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 Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
***Checked for relevance on 09-Sep-2016***

Symptoms

 ORA-01628 errors i.e max # extents (32765) reached for rollback segment <SEGMENT_NAME> error reported even when the transactions are smaller

 

Changes

 The maximum number of Undo extents possible in an Undo segment is 32k. By default the size of the Undo extents increase with the number, if there is enough free contiguous space in the Undo tablespace.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
 Related Issues:
References

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