When using the count aggregation operator you may have noticed that it sometimes returns nothing rather than 0. Why is this?
Reliable Insights
A blog on monitoring, scale and operational Sanity
Alerting is an art. One must be sure to alert just enough to be aware of all problems arising in the monitored system while at the same time not drown out the signal with excess noise. In this blogpost we'll explain some of the best practices to use when alerting with Prometheus.
Wouldn't it be nice to have arbitrary locations on the Worldmap panel?
The Worldmap Panel for Grafana allows displaying of metrics on a map.
You may have noticed that notifications from the Alertmanager are text. Wouldn't it be nice if Prometheus sent graphs along?
If your applications are restarting regularly, whether due to segfaults or OOMs, it'd be nice to know.
Worried that your application metrics might suddenly explode in cardinality? sample_limit can save you.
So you have just discovered Prometheus and want to try it out or use it to replace your old monitoring system but have run into a part of your stack that you cannot instrument with a client library and for which there are no officially supported exporters. What do you do?
Jobs of an ephemeral nature are often not around long enough to have their metrics scraped by Prometheus. In order to remedy this the Pushgateway was developed to allow for these types of jobs to push their metrics to a metrics cache in order to be scraped by Prometheus long after the original jobs have gone away. This blogpost discusses some of the common pitfalls users tend to fall into when adding the Pushgateway to their monitoring stack.
