Q31 PostgreSQL Domain 2 · 25–30% of exam

What is the maximum vector dimension supported by pgvector?

  1. A 512
  2. B 1536 (correct answer)
  3. C 2000
  4. D Unlimited

Shortcut: pgvector supports up to 2000 dimensions; however, HNSW indexing is currently limited to 2000 and IVFFlat to 2000. Most embedding models produce 768 or 1536 dimensions.