Huge Wait On Database With "enq: CN - Race With Reg" Wait Event With The Use Of Query Change Notification
(Doc ID 2386606.1)
Last updated on AUGUST 04, 2018
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 and later
Information in this document applies to any platform.
Huge number of database sessions are waiting with wait event "enq: CN - race with reg". Querying the sys.reg$ shows huge number of registrations with LOCATION_NAME of the form "net8://...."
Client Result Cache feature is enabled at the database level.
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