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Paired with Citation Chip: the inline markers and the list below read the same sources array and each derives its numbering from it (de-duplicated, in order of first appearance), so the two can never disagree — pgvector is cited twice in the prose, both markers read 1, and the list carries one row 1 marked “Cited 2×”

Postgres can do vector search in-database with pgvector1pgvector supports exact and approximate nearest neighbor search. HNSW indexes have better query performance than IVFFlat but take longer to build and use more memory., and its HNSW index is the one you want when query latency matters more than build time2The proposed Hierarchical Navigable Small World graphs achieve logarithmic complexity scaling and outperform previous open-source approaches on recall at a fixed query time.. Lowering ef_search buys throughput at the cost of recall3We dropped ef_search from 100 to 40 and recall fell off a cliff on our 8M-row table — YMMV, we never profiled it properly., which is why the same page shows up twice in the list below1pgvector supports exact and approximate nearest neighbor search. HNSW indexes have better query performance than IVFFlat but take longer to build and use more memory..

Sources3 sources · 4 citations

Citation 1
github.comCited 2 times in this answer
pgvector — open-source vector similarity search for Postgres
OfficialRelevance 94%Retrieved12m ago
pgvector supports exact and approximate nearest neighbor search. HNSW indexes have better query performance than IVFFlat but take longer to build and use more memory.
Citation 2
arxiv.org
Efficient and robust approximate nearest neighbor search using HNSW graphs
ReferenceRelevance 88%Retrieved51m ago
The proposed Hierarchical Navigable Small World graphs achieve logarithmic complexity scaling and outperform previous open-source approaches on recall at a fixed query time.
Citation 3
forum.example.com
Tuning ef_search on a 8M row table — what did you land on?
CommunityRelevance 61%Retrieved3d ago
We dropped ef_search from 100 to 40 and recall fell off a cliff on our 8M-row table — YMMV, we never profiled it properly.

status="ready" · 9 citations from 7 sources: repeats collapse into one counted row. Trust is carried by an icon plus a word (Official / Reference / Community / Unverified, the weakest one also framed with a dashed border), never by colour; relevance is written as a percentage and the bar only repeats it; retrievedAt is the crawl time, made relative to an injected now, with the absolute time on the title attribute in timeZone (UTC by default)

Sources for this answer7 sources · 9 citations

Citation 1
github.comCited 3 times in this answer
pgvector — open-source vector similarity search for Postgres
OfficialRelevance 94%Retrieved12m ago
pgvector supports exact and approximate nearest neighbor search. HNSW indexes have better query performance than IVFFlat but take longer to build and use more memory.
Citation 2
arxiv.org
Efficient and robust approximate nearest neighbor search using HNSW graphs
ReferenceRelevance 88%Retrieved51m ago
The proposed Hierarchical Navigable Small World graphs achieve logarithmic complexity scaling and outperform previous open-source approaches on recall at a fixed query time.
Citation 3
forum.example.com
Tuning ef_search on a 8M row table — what did you land on?
CommunityRelevance 61%Retrieved3d ago
We dropped ef_search from 100 to 40 and recall fell off a cliff on our 8M-row table — YMMV, we never profiled it properly.
Citation 4
Internal document
Retrieval runbook — recall thresholds and fallback copy
OfficialRetrieved2h ago
The retrieval layer's default recall threshold is 0.75. Passages below it never reach the prompt, and the answer says it found no sufficiently trustworthy source.
No link available
Citation 5
Uploaded file
vector-index-benchmarks-2026Q1.xlsx
Retrieved6h ago
Sheet 3 holds the p95 latency numbers quoted above, measured on the staging cluster.
No link available
Citation 6
blog.example.net
Benchmarking vector indexes, 2021 edition
CommunityRelevance 34%Retrievedlast yr.
The original post compared four index types on a 100k-row corpus; only the summary table survives in the search index.
Link unavailablehttps://blog.example.net/2021/03/benchmarking-vector-indexes-ivfflat-hnsw-annoy-and-faiss-on-commodity-hardware
Citation 7
benchmarks.example.org
ANNBenchmarksNightlyRun_2026-05-03T23:59:59Z_dataset=glove-100-angular_index=hnsw_efConstruction=512_M=48
UnverifiedRelevance 20%Retrieved9h ago
Auto-generated digest. The identifier below is reproduced verbatim from the crawler's manifest and is not meant to be readable.

No trust data means none is invented: this payload carries only id / title / url, so the row shows just the number, the domain and the title — no rating, no score, no crawl time

Minimal payload2 sources

Citation 1
rfc-editor.org
RFC 9110 — HTTP Semantics
Citation 2
developer.mozilla.org
Cache-Control — HTTP | MDN

Sources are untrusted input: the img/onerror and script tags in the excerpt render verbatim as text (highlighting builds real mark elements, never dangerouslySetInnerHTML), and the javascript: href is rejected so that title renders as plain text instead of a link

Untrusted crawl2 sources

Citation 1
deals.example.com
Deals of the week <b>50% off</b>
UnverifiedRelevance 41%Retrieved35m ago
Signup bonus <img src=x onerror=alert(1)> claim it now <script>alert(document.domain)</script> — the crawler stored the page body verbatim.
Citation 2
Web page
Untrusted href
Retrieved37m ago
The href on this entry is a javascript: URL, which is why the title below is not a link.
No link available

status="loading" · skeletonRows={4}: the skeleton reuses the real row geometry (number tile + three lines of text) and stops animating under prefers-reduced-motion

status="empty" · "this answer retrieved nothing" is a different sentence from "retrieval failed" (swap the whole block out with emptyState)

No sources cited

This answer was written without retrieval — nothing here was grounded in a document.

status="error" · Try again only renders when onRetry is passed, and clicking it really goes error → loading → ready — it is not decoration

Couldn't load the sources

The answer above still stands; only its reference list failed to arrive.

status: error

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