Number of requests currently being handled by this pod.
Average concurrency is calculated at the networking
pkg side as follows:
reqchange happens, the time delta between changes is calculated. Based on the result, the current concurrency number over delta is computed and added to the current computed concurrency. Additionally, a sum of the deltas is kept.
Current concurrency over delta is computed as follows:
Each time a reporting is done, the sum and current computed concurrency are reset.
When reporting the average concurrency the current computed concurrency is divided by the sum of deltas.
When a new request comes in, the global concurrency counter is increased. When a request is completed, the counter is decreased.