# HnswOptions Optional request-level overrides for pgvector HNSW search settings. Unset fields inherit server defaults. ```python from goodmem.models import HnswOptions ``` - `ef_search` (`int | None`, optional): HNSW candidate list size (1..1000). JSON: `efSearch`. - `iterative_scan` (`HnswIterativeScan | None`, optional): HNSW iterative scan mode. Use POST retrieve for this advanced tuning control. JSON: `iterativeScan`. - `max_scan_tuples` (`int | None`, optional): Maximum tuples to scan during iterative filtering (1..2147483647). JSON: `maxScanTuples`. - `scan_mem_multiplier` (`float | None`, optional): Multiplier on work_mem for iterative scanning (1.0..1000.0). JSON: `scanMemMultiplier`. [Python](../../python.md) Related types — open only those used by your request: - [HnswIterativeScan](HnswIterativeScan.md)