mirror of https://github.com/prometheus/prometheus
To cover the cases where stale markers may not be available, we need to infer the interval and mark series stale based on that. As we're lacking stale markers this is less accurate, however it should be good enough for these cases. We need 4 intervals as if say we had data at t=0 and t=10, coming via federation. The next data point should be at t=20 however it could take up to t=30 for it actually to be ingested, t=40 for it to be scraped via federation and t=50 for it to be ingested. We then add 10% on to that for slack, as we do elsewhere.pull/2681/head^2
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