Our production ArcGIS Server env recycles its services at midnight every day which, for the subsequent few hours after that recycling event, causes all kinds of ArcGIS Monitor alert mayhem resulting in 30+ notifications to my email account. Every day I have to go to my email client and blindly delete all those meaningless emails.
This week I've implemented a nice workaround that I figured is worth sharing. I've set up a Windows Task Scheduler on the ArcGIS Monitor machine to stop the ArcGIS Monitor service at 23:57. Then at 03:00, another task fires the service back up. Done and done.
To try it out, follow these steps. For the service in question, I used the oddly named "arcgismonitorservicearcgismonitorservice.exe". You'll create two tasks... one to do the NET STOP and another to do the NET START.