Adding visit_percentage and rescoring to speed/accuracy section#5180
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Adding visit_percentage and rescoring to speed/accuracy section#5180
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benwtrent
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tteofili
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Feb 23, 2026
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tteofili
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LGTM, with a minor comment.
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| When a search targets both HNSW and DiskBBQ indices, use `visit_percentage` with `num_candidates` to tune performance and recall across both index types. | ||
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| When [quantization](elasticsearch://reference/elasticsearch/mapping-reference/dense-vector.md#dense-vector-quantization) is involved, `rescore_vector` is an additional speed/accuracy tuning tool. It reranks a larger candidate set using original vectors after approximate retrieval. |
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perhaps we should mention that in bbq_disk, when not specified, oversampling also automatically adjusts to the quantization scheme (1-bit --> 3x, 2-bit --> 1.5x, 4-bit --> no oversampling)
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closes: #5175