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Sorted heap table AM for PostgreSQL with zone map scan pruning
57 starsPLpgSQL
Pg_sorted_heap–Physically sorted PostgreSQL with builtin vector search
by skuznetsov37·Mar 6, 2026·10 points·1 comment
AI Analysis
●●●BangerWizardryBig Brain
Zone-mapped sorted heap with 30x smaller IVF index than HNSW, no pgvector limits.
Strengths
- •Zone maps prune 519K blocks to 1, delivering 1-2 buffer reads for point queries at 100M rows.
- •IVF-PQ built-in beats pgvector's 2K-dim ceiling and 50GB HNSW footprint; 97-99% recall with reranking.
- •Compaction and merge logic designed for production: non-blocking variants, parameterized predicate support.
Weaknesses
- •Brand-new extension, unproven in large deployments, no production case studies yet.
- •Zone map v6 format adds maintenance complexity; limited to first two PK columns for efficacy.
Category
Target Audience
PostgreSQL DBAs, analytics engineers, vector search users at scale
Similar To
pgvector with HNSW · Elasticsearch vector search · DuckDB iceberg-style storage
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