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Debug Vector pipeline backpressure before buffers become log loss

A practical guide to separate slow transforms, full buffers, and saturated sinks without turning the incident into observability archaeology.

Learn how to diagnose delayed and dropped logs in Vector with internal metrics, `vector top`, PromQL rules, disk buffers, and a safe canary before changing production.

Created: June 25, 2026

Published: June 25, 2026

Estimated time45 min

LevelAdvanced

Before you startRead access to Vector configuration and internal metrics.

PlatformsLinux / Docker

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Docker

Flow to reproduce the diagnosis in a container before changing the real deployment.

dockervolume with Vector configurationport 8686 published

Start Vector with metrics

docker run --rm -p 8686:8686 -v "$PWD/vector.yaml:/etc/vector/vector.yaml" timberio/vector:latest --config /etc/vector/vector.yaml

Validate from a container

docker run --rm -v "$PWD:/work" timberio/vector:latest validate /work/vector.yaml

Also available inDepurar backpressure en pipelines de Vector antes de perder logs

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