i am using prometheus and grafana to visualize data from a jenkins instance. I am using Jenkins metrics and prometheus metrics plugins to extract metrics for Prometheus, i have created a basic Grafana dashboard for instant metrics and some graphs and right now i need to create a promql query to extract the fluctuation from the last time the metric changes for the build time of a Jenkins job. I found out about changes() and rate() promql function but i don't get the result i am waiting.
The last query that i used was: changes(default_jenkins_builds_last_build_duration_milliseconds{jenkins_job="$project"}[1m])
where the variable $project let me select the job that i need to investigate in Grafana.
is that the right approach ??? do you have any alternative idea ???
Unfortunately the only way to do it, for me is this PromQl query,
round((default_jenkins_builds_last_build_duration_milliseconds > 1.5 * (avg_over_time(default_jenkins_builds_last_build_duration_milliseconds[30d]) and default_jenkins_builds_last_build_result_ordinal == 0))/1000/60 , 2)
It isn't the cleanest way but with some alert suppression it can work.