Which PromQL expression computes how many requests in total are currently in-flight for the following...

In Prometheus, when you have multiple time series that represent the same type of measurement across different instances, thesum() aggregation operatoris used to compute their total value.

Here, each instance (1 and 2) exposes the metric apiserver_current_inflight_requests, indicating the number of active API requests currently being processed.

To find thetotal number of in-flight requests across all instances, the correct expression is:

sum(apiserver_current_inflight_requests)

This returns 5 + 7 = 12.

min() would return the lowest value (5).

max() would return the highest value (7).

sum_over_time() calculates the cumulative sumover a range vector, not the current value, so it’s incorrect here.