What does the probes_per_query parameter control in pgvector IVFFlat indexes?
- A Number of index build threads
- B Number of inverted lists probed during ANN search, trading recall for speed (correct answer)
- C Maximum vector dimensions
- D Compression ratio
Shortcut: probes=N) controls how many inverted list clusters are scanned during search. Higher values improve recall but increase query time.
probes_per_query (set via SET ivfflat.probes=N) controls how many inverted list clusters are scanned during search. Higher values improve recall but increase query time.