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Sessions Hang on Wait Event "WAIT FOR EMON PROCESS NTFNS" (Doc ID 1287435.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Information in this document applies to any platform.

Symptoms

RDBMS 10.2.0.4.0
OCI based DB change notification
EMON spin with high CPU usage
EMN0 locks affected multiple applications for a few hours.
Performance suffers until DBCN Database Change Notification is disabled.

Cause

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