Can you explain what Prometheus recording rules are?
Sure! Prometheus recording rules allow you to precompute frequently needed or computationally expensive expressions and save them as new time series.
How do I define a recording rule in Prometheus?
You define a recording rule in the Prometheus configuration file under the 'rules' section, specifying the name and the expression.
Can you give me an example of a recording rule?
Absolutely! For instance, you can create a rule to record the average CPU usage: avg(rate(cpu_usage_seconds_total[5m])) by (instance)
. This will create a new time series with the average CPU usage.
What are the benefits of using recording rules?
The benefits include improved query performance, reduced load on the Prometheus server, and easier access to commonly used metrics.
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