My Oracle Support Banner

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

Last updated on MARCH 07, 2019

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.
***Checked for relevance on 23-Feb-2012***


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

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Symptoms
Cause
Solution
References


My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.