# RAG debugging guide: fast ways to reduce retrieval errors

DevFeed: [RAG debugging guide: fast ways to reduce retrieval errors](<https://devfeed.tech/articles/rag-debugging-guide-fast-ways-to-reduce-retrieval-errors-4838.md>)

Original publisher: [Read original article](<https://redis.io/blog/rag-debugging-guide-retrieval-errors/>)

Author: Jeff Mills

Published: 2026-07-21T00:00:00Z

Content type: tutorial

Language: en

Sources: [Redis Blog](<https://devfeed.tech/sources/redis-blog.md>)

Topics: [Retrieval Augmented Generation (RAG)](<https://devfeed.tech/topics/retrieval-augmented-generation-rag.md>), [debug](<https://devfeed.tech/topics/debug.md>), [Monitoring](<https://devfeed.tech/topics/monitoring.md>), [AI search](<https://devfeed.tech/topics/ai-search.md>), [Latency](<https://devfeed.tech/topics/latency.md>), [Traces](<https://devfeed.tech/topics/traces.md>)

Tags: [debugging](<https://devfeed.tech/tags/debugging.md>), [docs](<https://devfeed.tech/tags/docs.md>), [embedding](<https://devfeed.tech/tags/embedding.md>), [errors](<https://devfeed.tech/tags/errors.md>), [guide](<https://devfeed.tech/tags/guide.md>), [latency](<https://devfeed.tech/tags/latency.md>), [logs](<https://devfeed.tech/tags/logs.md>), [monitoring](<https://devfeed.tech/tags/monitoring.md>), [rag](<https://devfeed.tech/tags/rag.md>), [retrieval](<https://devfeed.tech/tags/retrieval.md>), [tech-de](<https://devfeed.tech/tags/tech-de.md>), [traces](<https://devfeed.tech/tags/traces.md>), [vector](<https://devfeed.tech/tags/vector.md>)

## AI overview

A practical guide to diagnosing five common production RAG failures across retrieval, ranking, grounding, freshness, and latency. It explains how chunking, vocabulary mismatch, monitoring, logs, and traces can reveal why a system returns confidently incorrect answers.

## Source excerpt

Your RAG-backed support assistant just told a customer the refund window is 30 days. It's 14. The retrieval logs look clean: chunks came back, latency was normal, nothing errored. That's what makes RAG failures slippery. The pipeline still returns an ...