Azure job wait-time per pool

[JnivDd]

We have a use case where we need to get the wait time of the jobs in a pool
We also are looking for a way to get wait time for a specific build in a pool
like azure_devops_stats_agentpool_builds_wait_sum

The documentation is rather vague, how exactly are we supposed to use it? I am new to promethous as a whole

This is the intended result

[mblaschke]

here an example from prometheus:
https://prometheus.io/docs/practices/histograms/#count-and-sum-of-observations

  rate(http_request_duration_seconds_sum[5m])
/
  rate(http_request_duration_seconds_count[5m])

so you can use eg:

rate(azure_devops_stats_agentpool_builds_wait_sum[15m])
/ 
rate(azure_devops_stats_agentpool_builds_wait_count[15m])

[dhavalshah02]

This leads to NaN values appearing when there is no difference between scrapes. Any way to avoid it. I too believe a direct count is more beneficial