High "gc buffer busy acquire" wait after Upgrade to 11.2
Last updated on FEBRUARY 14, 2017
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
After a database was migrated (using export/import) from a 10.2.0.4 RAC cluster to a new cluster with Grid Infrastructure 22.214.171.124 and RDBMS 126.96.36.199, 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:
Upgraded a database from a 10.2 cluster to a 11.2 new cluster
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