How to display a gazillion of metrics and keep your sanity
Say, you have a distributed cluster of 100 nodes. Say, every node collects 100 metrics. Now, imagine a chart with all the metrics from all the nodes. Have you managed it? At Hazelcast they have not.
We will talk about what to do when you want to display all the data at once, but your users have a limited number of monitors and only one pair of eyes. We will speculate about what users want to see when they look at a chart of a monitoring web app. We will go over different approaches to filter the data and how an average, a median, and a definite integral can help us with that.