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Gitlab has a complete metrics dashboard running on a Grafana instance. If I head to Gitlab Omnibus - Overview, within this dashboard, I can see a Workhorse Latency panel and if I step the mouse over, it shows me the count of requests on that specific bucket. So if I understand correctly, there are three requests in the bucket 10s - 30s in the image below.

enter image description here

However, when I inspect the data, I see these numbers in image 2, which do not make sense to me. What do these figures mean? How do I make sense of them?

On Prometheus I see the same numbers from the query: sum by (le)(rate(gitlab_workhorse_http_request_duration_seconds_bucket{instance=~"localhost:9229"}[1m]))

How can I count those numbers to make the same as what I'm seeing in the panel?

enter image description here

Francisco Zanartu
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1 Answers1

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The GitLab Prometheus metrics does include indeed:

  • gitlab_rails_queue_duration_seconds Measures latency between GitLab Workhorse forwarding a request to Rails
  • gitlab_transaction_rails_queue_duration_total Measures latency between GitLab Workhorse forwarding a request to Rails

I suppose the first graph display the number of queries which were within a certain latency limit, as reported by all the occurrences listed by the second image.

VonC
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