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Sample Runs, Not Spans: Shrink Agent Traces Without Losing Failures

This story is from 2026-10-16. It is preserved in the archive; the latest stories are on the live feed.

At 09:12 the on-call page fired. A checkout agent returned HTTP 500 for forty minutes. We opened the trace store and found two weeks of spans. The failing run was not in it. Our sampler had dropped the interesting spans. It kept the boring ones. That is the classic sampling bug, and it is a retenti…

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  1. 2026-10-16 05:02 · DEV Community — AI
    Sample Runs, Not Spans: Shrink Agent Traces Without Losing Failures

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