My Oracle Support Banner

High "gc buffer busy acquire" wait after Upgrade to 11.2 (Doc ID 2047582.1)

Last updated on SEPTEMBER 13, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 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 Backup Service - Version N/A and later
Generic Linux

Symptoms

After a database was migrated (using export/import) from a 10.2.0.4 RAC cluster to a new cluster with Grid Infrastructure 12.1.0.2 and RDBMS 11.2.0.4, customer observed "gc buffer busy acquire" as the top wait event whenever the load increased significantly.

This behaviour was not observed in the "old" 10.2 environment, there was no change neither in the data (amount) nor in the application.

AWR report from instance 1 shows the following during times of high load:

 

 

Changes

 Upgraded a database from a 10.2 cluster to a 11.2 new cluster

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!


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