tristaZero commented on issue #8517:
URL: https://github.com/apache/shardingsphere/issues/8517#issuecomment-741599273


   Hi @wangleigithub 
   
   Could you set `max-connections-size-per-query = N +1`?
   N = the count of sharding tables in one database instance
   
   That way, we can parallelize the queries and handle the results by streaming 
merging.


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