# HnswOptions Optional request-level overrides for pgvector HNSW search settings. Unset fields inherit server defaults. `Goodmem.Client.Models.HnswOptions` - `EfSearch` (`int?`): HNSW candidate list size (1..1000). JSON: `efSearch`. - `IterativeScan` (`HnswIterativeScan?`): HNSW iterative scan mode. Use POST retrieve for this advanced tuning control. JSON: `iterativeScan`. - `MaxScanTuples` (`int?`): Maximum tuples to scan during iterative filtering (1..2147483647). JSON: `maxScanTuples`. - `ScanMemMultiplier` (`double?`): Multiplier on work_mem for iterative scanning (1.0..1000.0). JSON: `scanMemMultiplier`. [.NET](../../dotnet.md) Related types — open only those used by your request: - [HnswIterativeScan](HnswIterativeScan.md)