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Contention of the SYSTEM Rollback Segment May Occur Due to an Abrupt Increase in Transaction Processing (Doc ID 2515969.1)

Last updated on JANUARY 29, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Information in this document applies to any platform.

Symptoms

Contention of the SYSTEM rollback segment may occur due to an abrupt increase in transaction processing.
Looking at the information of Active Session History, we can see that the blocker session is waiting at buffer busy waits and the object is class = # 15 (undo segment header).

Cause

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In this Document
Symptoms
Cause
Solution


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