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

Last updated on JULY 14, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud 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
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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In this Document
Symptoms
Cause
Solution
References


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