Vector Search Done Right: Best Practices, Qwen3 Dimension Control, and Why Reranking Is…

Vector Search Done Right: Best Practices, Qwen3 Dimension Control, and Why Reranking Is Non-Negotiable Three things your RAG pipeline on Databricks needs to get right - and why most pipelines get at least one of them wrong. The Problem With “Good Enough” Retrieval RAG pipelines fail quietly. When your agent gives an incomplete or wrong answer, the LLM gets the blame - but often the problem is upstream. The wrong context was retrieved. The index was built with defaults that prioritise convenience over performance. The reranker was skipped because it seemed optional.