This is specifically for the old interface, which I assume would get ported to the new interface.
Summary: Type 'notification' blackouts do not apply to Performance Alerts
Currently, blackouts of type 'monitoring' affect both device/availability and performance alerts.
Blackouts of type 'notification' affect only device/availability alerts and NOT performance alerts.
I would expect a blackout to stop all alerts/notifications, certainly if I don’t care about availability I wouldn’t need performance info -- or at least that's my case.
The way it currently works I would call it a partial 'notification' blackout.
Thanks,
Randall