OptionNUMBER_OF_ROWS_IN_SEGMENT_TO_HOST_MAPPING_TABLE
Description Number of rows in the hash table that maps segments to hosts for bucketed segments. Configured when you have a cluster with many different hosts.
Introduced Version1.205.0
Default10,000
Maximum100,000

If you set a higher row value, this may give better distribution. But the tradeoff is, if a node dies or there are other changes to the cluster, then it is a much larger table to recalculate and will take longer.