PROPAGATION JOBS CONSUMES CPU BECAUSE LARGE NUMBER OF QUERIES ON SYS.REG$ (Doc ID 976054.1)

Last updated on MAY 15, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.7 to 11.2.0.1.0 [Release 11.1 to 11.2]
Information in this document applies to any platform.

Symptoms

You can see that propagation jobs consume a lot of CPU although there is not a high propagation activity.

when analyzing the situation you observe that CPU consumes is because a select on sys.reg$ which was repeatedly done.

At 22:00 this behavior the number of queries on sys.reg$ is drastically reduced. Later the number of execution increase rapidly.

Changes

You have already applied patch 7639602 as the first time we got the issue, however, it did not solve the issue.

Cause

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