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Prefer an index-level override when one index, rather than the whole cluster, is exceptional.","small":"Do not raise gin_fuzzy_search_limit merely because the default is reached; bound memory and I/O bursts, and keep exact-query semantics unless approximation is explicitly acceptable."},"mechanism":["gin_fuzzy_search_limit sets the maximum allowed result for exact search by GIN. 0 means no limit. A positive limit makes broad GIN searches return a randomly chosen subset of matches, trading completeness for bounded work; zero preserves exact results.","gin_fuzzy_search_limit is a USER-context setting. An authorized role can change it for a session, while ALTER ROLE or ALTER DATABASE can establish a default for future sessions.","GIN behavior also depends on per-index storage parameters, work or maintenance memory, autovacuum, and the shape of indexed values and predicates."],"pitfalls":["Changing gin_fuzzy_search_limit in one session and assuming role defaults, database defaults, or other pooled sessions changed with it.","Applying a cluster-wide GIN value to fix one exceptional index instead of using its storage parameters.","Ignoring cleanup latency, I/O bursts, autovacuum interaction, or result completeness while tuning.","Enabling a positive limit without telling callers that exact searches may return an incomplete random subset."],"references":[{"title":"PostgreSQL 19 Beta 4: gin_fuzzy_search_limit","url":"https://www.postgresql.org/docs/19/runtime-config-client.html#GUC-GIN-FUZZY-SEARCH-LIMIT"},{"title":"PostgreSQL 19 release notes","url":"https://www.postgresql.org/docs/19/release-19.html"}],"related":["gin_pending_list_limit","maintenance_work_mem","work_mem","vacuum_cleanup_index_scale_factor","autovacuum_work_mem"],"summary":"gin_fuzzy_search_limit is the PostgreSQL setting that defines the maximum allowed result for exact search by GIN."},"enumvals":[],"first_version":"8.2","group":"Client Connection Defaults","group_slug":"client","imported_at":"2026-09-27T17:57:31.333529+08:00","intro_commit":{},"key":"gin_fuzzy_search_limit","last_version":"20","max_val":"","min_val":"","name":"gin_fuzzy_search_limit","position":160,"present_in":["8.2","8.3","8.4","9.0","9.1","9.2","9.3","9.4","9.5","9.6","10","11","12","13","14","15","16","17","18","19","20"],"repair_provenance":{"original_source_revision":"english-manuals:f942becd98667dac4bd516eeaac230c28d053d99add72266a9fcae9913f0bd93","receipt_sha256":"dd1854bd23b4601030a7d5a5089a3a9c60471c5d828e6cac1990770102d46950","repair":"wiki-repair-20261023"},"short_desc":"Soft upper limit of the size of the set returned by GIN index scans.","short_desc_zh":"","source_rev":"wiki-repair-20261023:5d9b6c9dbdf3333f2737281d9a82487ce2a22fd319ed145cdee073b999f285f7","unit":"","vartype":"integer"}},"Definition":{"Collection":"guc","Key":"gin_fuzzy_search_limit","SourceDatabase":"center","Version":"18","SourceTable":"guc","SourceKey":"gin_fuzzy_search_limit","SourceRevision":"wiki-repair-20261023:5d9b6c9dbdf3333f2737281d9a82487ce2a22fd319ed145cdee073b999f285f7","Facts":{"boot_val":"0","category":"Client Connection Defaults / Other Defaults","context":"user","description":"Soft upper limit of the size of the set returned by GIN index scans. 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