My Oracle Support Banner

Troubleshooting 'enq: FB - contention' Format Block Enqueues. (Doc ID 1379986.1)

Last updated on AUGUST 24, 2021

Applies to:

Oracle Database - Enterprise Edition
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
***Checked for relevance on 02-Sep-2016***
Database performance may get affected, inserts/DML might become slow.


To understand enq: FB Contention, impact of this on Database Performance and how to resolve this contention.


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
 If this wait appears in the Top 5 waits, one can look to implement the following:

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