how to make indexed_vectors_count = 0 value

[vihariazure]

below is my collection in info

CollectionInfo(status=<CollectionStatus.GREEN: 'green'>, optimizer_status=<OptimizersStatusOneOf.OK: 'ok'>, vectors_count=None, indexed_vectors_count=997224, points_count=1000000, segments_count=16, config=CollectionConfig(params=CollectionParams(vectors=VectorParams(size=768, distance=<Distance.EUCLID: 'Euclid'>, hnsw_config=None, quantization_config=None, on_disk=None, datatype=None, multivector_config=None), shard_number=4, sharding_method=None, replication_factor=1, write_consistency_factor=1, read_fan_out_factor=None, on_disk_payload=True, sparse_vectors=None), hnsw_config=HnswConfig(m=16, ef_construct=100, full_scan_threshold=10000, max_indexing_threads=0, on_disk=False, payload_m=None), optimizer_config=OptimizersConfig(deleted_threshold=0.2, vacuum_min_vector_number=1000, default_segment_number=0, max_segment_size=None, memmap_threshold=None, indexing_threshold=20000, flush_interval_sec=5, max_optimization_threads=None), wal_config=WalConfig(wal_capacity_mb=32, wal_segments_ahead=0), quantization_config=None), payload_schema={})

ideally indexed_vectors_count should zero right

the performance also reduces with the increasing in indexed_vectors_count number

what is the reason for above . how to make indexed_vectors_count to zero (with right parameters, while creating the collection )

once the data ingestion completes for example 1m(records). what is the ideal time for getting indexed_vectors_count=0