High CPU Utilization when performing a Conditional Dequeue
Last updated on MAY 05, 2017
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.5 [Release 10.2]
Oracle Database - Enterprise Edition - Version 184.108.40.206 to 220.127.116.11 [Release 11.1]
Information in this document applies to any platform.
Queries related to dequeue by condition and specifically in accessing the view (new in 10.2.) aq$_<queue_table>_f are significantly slower in 10.2 than they had been in 9.2.
A feature of the issue is :
- high CPU associated with acessing the view : aq$_<queue_table>_f , as well as
- a high number of buffer gets per execution.
Upgrade to 10.2
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