The Sampling Layer — Or, "We Measured It" Is Not the Same as "We Measured All of It"
A team enables tracing at one percent to keep the bill down. The dashboard is green. Then a customer reports that checkout takes eleven seconds, and the traces show forty milliseconds, because the slowest requests are the ones least likely to be in the sample — not through malice, but through arith…
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- 2026-11-10 01:01 · DEV Community — AI
The Sampling Layer — Or, "We Measured It" Is Not the Same as "We Measured All of It"