[pashkinelfe]

Pgvector doesn't need to store everything in memory. It behaves similar to almost any Postgres AM's and store index data on disk. Performance-wise it's better to have enough memory for index data remain in shared memory buffers, but it is not a requirement for pgvector.

[moab]

Thanks for the response. I wonder whether HNSW will still perform well if it needs to page neighbor-lists to/from disk. Do you plan to benchmark the setting where the dataset is too large to fit in-memory?