rank_bm25

A developer found that BM25's default length normalization parameter (b=0.75) systematically penalizes long RAG chunks, causing exact-answer chunks to rank below irrelevant headings. The analysis show…

A principal data engineer argues that teams migrating to vector databases often silently drop BM25 keyword search, harming recall on identifier queries critical for fraud detection. In a fraud queue, …

A developer building ContextQuery, a production RAG system on free-tier infrastructure, achieved 100% retrieval precision by implementing hybrid retrieval with Reciprocal Rank Fusion (RRF). The approa…