~/writing
Bm25
2 posts tagged bm25. clear filter
September 2026
- 20Why swapping BM25 for a vector DB can silently lower recallday 16 · Data & Retrieval Engineering in 30 Days
A vector DB looked like an obvious upgrade until the numbers came back, and by then the agent had been quietly answering from the wrong documents for weeks.
- 15Why vector search misses exact matches like SKUsday 11 · AI Fundamentals in 30 Days
A cosine similarity score feels like proof of quality — until an exact SKU search comes back empty, and you realize 'semantic' was never something you'd actually measured.