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AcademyblogTaming log noise with OpenTelemetry's drain processor

Taming log noise with OpenTelemetry's drain processor

How a single processor cut our trace volume by 40 percent on the OpenRegister API.

BlogOpenTelemetryInstrumentation
Conduction·4 mei 20261 min read

A short note on a single OpenTelemetry collector processor that disproportionately moved the needle for us. This post is a placeholder while we draft the full version.

What changed

We added the drain processor to the OpenRegister API's collector pipeline. It clusters near-identical log lines and emits one templated trace instead of N near-duplicates. Trace volume dropped 40 percent, alert noise dropped further, and the dashboards still answered every question we asked of them.

What is next

  • Roll out to OpenConnector and DocuDesk
  • Document the templating rules so app authors can self-serve
  • Add a guard against over-clustering on rare error paths