One of the big changes in Prometheus 2.15.0 was reduced memory usage for indexes.
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Along with many others, the node exporter exposes network interface metrics.
Just because SQL isn't in the name doesn't mean that you can't do SQL-like joins with PromQL.
If you look at the documentation, the Alertmanager has a to field, but nothing for CC or BCC. So how do you do those?
Subqueries were added to PromQL a while back, but there's more to this feature than it'd seem.
Services are not distinguished by their metric names in Prometheus.
The node exporter exposes filesystem metrics out of the box, so let's take a look.
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