Is that a joke-question? The one that I've used is the elasticsearch / kibana. And usually one would be using elasticsearch to monitor the elasticsearch :) Tha

Is that a joke-question? The one that I've used is the elasticsearch / kibana. And usually one would be using elasticsearch to monitor the elasticsearch :) That's the good thing about this setup, you have all the logs from all your applications (think like custom text logs from your routers, your custom applications, temperature sensors, syslogs, windows servers) aggregated in one place. And when something happens (at a particular moment in time, or with a particular machine, or with a particular key) suddenly you are able to search/drill down and locate the actual cause. And maybe even configure a dashboard or make a plot that would show when this problem was showing up. Scalable real time search engines with the ability to create trends/dashboards is one powerfull toy ;) It is ridiculuos and silly. But it is an immensely powerfull approach.