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202405/20240506_03.md

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@@ -16,6 +16,8 @@ https://jkatz05.com/post/postgres/pgvector-scalar-binary-quantization/
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向量搜索是近似求解, 并不是以返回精确结果为目标. 使用向量搜索要在这“空间、性能、召回”三个方面取一个平衡.
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就像cap理论, 向量搜索在“查询性能、空间占用/召回、写入/更新性能”几个方面无法同时既要又要还要.
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1、空间包括
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- 表的空间占用
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- 索引的空间占用

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