How to use PromQL joins for more effective queries of Prometheus metrics at scale
We recently heard that a customer, a power user of Prometheus, was grappling with 18,000 individual rules for its metrics, because its setup involved creating an individual rule group for each generated metric. Surely there was a better, more efficient way to handle this scale of metrics? In fact, we did come up with a solution, and this blog post will walk you through how you might benefit from it too.