I just had a bad morning... woke up to find that my server had crashed for five and a half hours while was sleeping (not sure why, Nginx process at 100% usage, not responding, no clues in the logs). I use New Relic for monitoring, and sure enough I got the text message alert and app push notifications from them, but that was not sufficient to wake me up. I need a service which will actually do more to seriously alert me if my server is down for an extended period of time. The ideal solution would be something which keeps calling me every few minutes until I answer and acknowledge the alert. Does anything like that exist? I know there are a million different monitoring services out there, but they all seem to have the standard email + text message alerts. That's ok, but it doesn't do you much good if you're the only sysadmin and you're asleep. How do you guys deal with this issue?