Lightning Talk: Would you like your rate smoothed or anchored?
summary
Prometheus adds two new experimental rate functions: anchored and smooth. Anchored computes integer deltas using the last sample before and at the range so it needs only one point and avoids extrapolation; smooth interpolates at range boundaries, requires the next (future) sample, and can work with zero points in-range. Implemented for Prometheus 3.7+ behind the feature flag enable feature promote extended range selectors; not yet compatible with native histograms.
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