Set numCandidates to 10-20x the limit or Atlas Vector Search recall suffers
Guide Set numCandidates to 10-20x the limit or Atlas Vector Search recall suffers: Start with numCandidates = limit * 20 (for example limit 10 -> numCandidates 200) and tune from there against a recall benchmark. Use this when you hit exactly this in this tool. Not for different errors or different tools.