Implement Sampling
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ckoch-cars commented
According to a conversation with Datadog, the Datadog agent does not down-sample itself, but expects the traces to be flagged, via :priority, to either keep or drop. Also, DD intends to charge for trace volume.
Would you consider a PR to implement this in this package? Possibly using an application env var?
ckoch-cars commented
Upon further review, sampling at the end of the process would be suboptimal. Distributed traces would not be consistently sampled the same way.
See a PR from my colleague for head-based sampling, which is what Datadog recommends.