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Database performance affected when flashback is enabled and many new flashback logs are generated (Doc ID 1148760.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 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 Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms


When flashback is enabled, OLTP type application response times are impacted causing transactions to time out.  Top wait event during this period is 'FLASHBACK BUF FREE BY RVWR'.

During a 30 min test when flashback was enabled, 5 new flashback logs totalling 1.7Gb were generated.

Cause

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In this Document
Symptoms
Cause
Solution
References


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