About Vchord & vchord.pgsty.com
Vchord (vchord) is a PostgreSQL extension designed for scalable, high-performance, and disk-friendly vector similarity search, developed as the architectural successor to pgvecto.rs.
This repository (pgsty/vchord.pgsty.com) and website (https://vchord.pgsty.com/) provide a complete, fast, local-first documentation and technical blog reference for pgsty/vchord, pgsty/vchord_bm25, and pgsty/pg_tokenizer, maintained by the Pigsty community using the OINK 1.4.0 documentation framework.
pgsty/vchord, pgsty/vchord_bm25, and pgsty/pg_tokenizer are community-maintained forks of tensorchord/VectorChord, tensorchord/VectorChord-bm25, and tensorchord/pg_tokenizer.rs. They are not affiliated with, endorsed by, or sponsored by TensorChord Inc. See Attribution and Trademark Policy for details.
Documentation Scope
| Section | Coverage |
|---|---|
vchord Docs |
Installation, migration from pgvecto.rs, vchordrq and vchordg indexing, MaxSim multi-vector retrieval, range queries, PostgreSQL tuning, external index precomputation, benchmarks, and SQL reference. |
vchord_bm25 Docs |
Complete documentation for pgsty/vchord_bm25: Okapi BM25 scoring, Block-WeakAnd Top-K index scans, prefiltering, hybrid search with vchord, and SQL/GUC/BEIR benchmark reference. |
pgvector Docs |
Complete documentation for pgvector: vector, halfvec, bit, and sparsevec types, distance operators, HNSW and IVFFlat indexing, iterative index scans, and quantization. |
pgvecto.rs Archive |
Complete legacy documentation for pgvecto.rs (vectors extension), including installation, indexing, filtering, framework integrations, and administration. |
pg_tokenizer Docs |
Complete documentation for pgsty/pg_tokenizer: text analyzer pipelines, character/token filters, Snowball stemmers, custom corpus models, HuggingFace models, Chinese jieba, and Japanese lindera. |
pg_bestmatch Docs |
Documentation for pg_bestmatch.rs: generating Okapi BM25 sparse vectors inside PostgreSQL for pgvector sparsevec and pgvecto.rs svector. |
| Engineering Blog | All 37 engineering deep-dives, benchmark analyses, hybrid search tutorials, and release announcements (pgvecto.rs 0.2 through VectorChord 1.1). |
| VectorChord Cloud | Reference documentation for VectorChord Cloud clusters, connection endpoints, scaling, VPC peering, monitoring, and billing. |
Software and documentation licensing for Vchord (pgsty/vchord, pgsty/vchord_bm25, pgsty/pg_tokenizer) and vchord.pgsty.com.
Upstream sources, copyright notices, stewardship transition, and modification records for vchord.pgsty.com.
Statement of independence and nominative trademark usage on vchord.pgsty.com.