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VectorChord
Company blog · blog.vectorchord.aidataprogramming
VectorChord is the company blog at blog.vectorchord.ai, writing about data and programming. Since 2025, 4 different Hacker News readers have linked it 24 times, most often “3B Vectors in PostgreSQL to Protect the Earth”. It is still writing: the last post was on 2026-02-14, and you can follow it by feed.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
Commenters link these posts as benchmark and case-study material for VectorChord, a Postgres vector search extension, comparing its IVF and quantization indexing with pgvector's HNSW.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Scalable, Low-latency and Hybrid-enabled Vector Search in Postgres. successor of pgvecto.rs
Most-linked posts?
- 3B Vectors in PostgreSQL to Protect the Earth3 people · 5 mentions · first linked 2025-04-08
- Vector Search over PostgreSQL: Analysis of Different Solutions2 people · 3 mentions · first linked 2025-04-16
What Hacker News says?
We do have some benchmark number at https://blog.vectorchord.ai/vector-search-over-postgresql-a-... . It varies on different dataset, but most cases it's 2x or more QPS comparing to pgvector's hnsw at same recall.
Comment linking /vector-search-over-postgresql-a-comparative-analysis-of-memory-and-disk-solutions
on “The Case Against PGVector”Submitted PostgreSQL Full-Text Search: Fast When Done Right (Debunking the Slow Myth) as a story · 427 points
HN discussionAnd we do have user hosting 3 Billion vectors with Postgres + VectorChord with sharding. And they're using vectors to save the earth! Check https://blog.vectorchord.ai/3-billion-vectors-in-postgresql-...
Comment linking /3-billion-vectors-in-postgresql-to-protect-the-earth
on “The Case Against PGVector”Submitted BM25 in PostgreSQL as a story · 139 points
HN discussionWe at https://github.com/tensorchord/VectorChord solved most of the pgvector issues mentioned in this blog: - We're IVF + quantization, can support 15x more updates per second comparing to pgvector's HNSW. Insert or delete an element in a posting list is a super light operation comparing to modify a graph (HNSW) - Our main branch can now index 100M 768-dim vector in 20min with 16vcpu and 32G memory. This enables use…
Comment linking /vectorchord-04-faster-postgresql-vector-search-with-advanced-io-and-prefiltering
on “The Case Against PGVector”Submitted Indexing 100M vectors in 20 minutes on PostgreSQL with 12GB RAM as a story · 92 points
HN discussionSubmitted Supercharge vector search with ColBERT rerank in PostgreSQL as a story · 72 points
HN discussionSubmitted Vector Search at 10k QPS in PostgreSQL as a story · 10 points
HN discussionSubmitted VectorChord 1.0: Vector Search on Postgres, 100x Faster Indexing than pgvector as a story · 6 points
HN discussionSubmitted VectorChord-BM25: PostgreSQL Search with BM25 – 3x Faster Than Elasticsearch as a story · 5 points
HN discussionSubmitted 3B Vectors in PostgreSQL to Protect the Earth as a story · 4 points
HN discussionSubmitted Vector Search over PostgreSQL: Analysis of Different Solutions as a story · 3 points
HN discussionSubmitted VectorChord 0.3: Multi-Vector Contextual Late Interaction in PostgreSQL as a story · 3 points
HN discussionSubmitted 3B Vectors in PostgreSQL to Protect the Earth as a story · 3 points
HN discussionSubmitted Vector Search over PostgreSQL: Analysis of Different Solutions as a story · 2 points
HN discussionSubmitted Protect the Earth with 3B Vector Search as a story · 2 points
HN discussionSubmitted Vector Search at 10k QPS in PostgreSQL as a story · 2 points
HN discussionSubmitted Hybrid Search with Postgres Native BM25 and VectorChord as a story · 2 points
HN discussionSubmitted Vector Search at 10k QPS in PostgreSQL as a story · 2 points
HN discussionSubmitted ARM and VectorChord: Affordable, Fast Vector Search as a story · 2 points
HN discussionSubmitted Earth Observability with the Help of Vectors as a story · 1 points
HN discussionSubmitted Vector Search at 10k QPS in PostgreSQL as a story · 1 points
HN discussionSubmitted VectorChord-BM25: Postgres BM25 Search – 3x Faster Than Elasticsearch as a story · 1 points
HN discussionSubmitted VectorChord 0.2: 60K-Dimensional Vectors, 50% Faster Indexing with ARM as a story · 1 points
HN discussion