Maximum and Minimum on Request Duration (Histograms))

PromQL
1

Hi,

I’m using Prometheus to monitor request durations via a histogram metric, e.g., http_request_duration_seconds_bucket. I would like to query:

  • The minimum time taken by a request
  • The maximum time taken by a request

…over a given time range (say, the last 1h or 24h).

I understand that histogram buckets give cumulative counts of requests below certain durations, but I’m not sure how to extract the actual min or max values of request durations during a time window.

Is this possible directly via PromQL? Or is there a recommended workaround (e.g., recording rules, external processing, or using histogram_quantile() in a specific way)?

Thanks in advance for any guidance!

Br,
Teja