Configure the HNSW parameters in Chroma

[pmeier]

ragna/ragna/source_storages/_chroma.py

Lines 94 to 100 in 7197577

	# FIXME: querying only a low number of documents can lead to not finding
	# the most relevant one.
	# See https://github.com/chroma-core/chroma/issues/1205 for details.
	# Instead of just querying more documents here, we should use the
	# appropriate index parameters when creating the collection. However,
	# they are undocumented for now.
	max(int(num_tokens * 2 / chunk_size), 100),

"Documentation" of the available parameters and their defaults is in chroma-core/chroma#1205 (comment).