Christophe Pettus: All Your GUCs in a Row: gin_fuzzy_search_limit
2026-07-26 5 min PostgreSQL All Your GUCs in a Row: gin_fuzzy_search_limit The name is misleading twice over. It has nothing to do with fuzzy matching, the trigram-similarity, close-enough-spelling sense that people reach for pg_trgm to get. The fuzziness is in the size of the result set, and what this parameter actually does is instruct PostgreSQL to give you fewer rows than match your query, chosen at random, without telling you.
- ▪2026-07-26 5 min PostgreSQL All Your GUCs in a Row: gin_fuzzy_search_limit The name is misleading twice over.
- ▪It has nothing to do with fuzzy matching, the trigram-similarity, close-enough-spelling sense that people reach for pg_trgm to get.
- ▪The fuzziness is in the size of the result set, and what this parameter actually does is instruct PostgreSQL to give you fewer rows than match your query, chosen at random, without telling you.
2 outlets in our directory ran this story, first to last over 7 hours. All of the coverage we found sits in one bucket: centre. That one-sidedness is itself worth noticing.
Planet PostgreSQL files mainly under programming. We currently carry 28 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Planet PostgreSQL |
| Canonical URL | https://postgr.es/p/9qw |
| Publication time | Mon, 27 Jul 2026 01:00:00 +0000 |
| Retrieval time | 2026-07-27T02:24:55.957Z |
| Last seen | 2026-07-27T02:25:06.496Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | WLweH_33K9z3 · 5 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
2026-07-26 5 min PostgreSQL All Your GUCs in a Row: gin_fuzzy_search_limit The name is misleading twice over. It has nothing to do with fuzzy matching, the trigram-similarity, close-enough-spelling sense that people reach for pg_trgm to get. And it is not really a search limit either. The fuzziness is in the size of the result set, and what this parameter actually does is instruct PostgreSQL to give you fewer rows than match your query, chosen at random, without telling you. That makes it close to unique in the GUC catalog. Plenty of parameters trade one resource against another, and a few trade durability for speed. This is the one that trades correctness for speed. Integer, default 0 meaning no limit, context user, valid up to 2147483647.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Planet PostgreSQL.
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