EM 12c: How to Disable Diskmon and ONS Monitor from Enterprise Manager 12c Cloud Control to Stop Notifications: Message=ora.diskmon has 1 instances in OFFLINE State
(Doc ID 2060296.1)
Last updated on APRIL 01, 2022
Applies to:Enterprise Manager for Oracle Database - Version 184.108.40.206.0 and later
Information in this document applies to any platform.
EM 220.127.116.11 Cloud Control monitors a RAC database host, on which critical alerts for DiskMon Offline are being generated for the High Availability Service.
Alert content similar to this is in the accompanying notification:
Target type=Oracle High Availability Service
Message=ora.diskmon has 1 instances in OFFLINE State
These errors are harmless for 18.104.22.168 and later database targets.
The associated metric can be disabled to stop generation of alerts and notifications with the following procedure:
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