weijietong commented on issue #2000: DRILL-7607: Support dynamic credit based flow control URL: https://github.com/apache/drill/pull/2000#issuecomment-593767181 Still on a pre-product stage at our env. But as I mentioned above , we could give a query a hint to open this feature not apply to all the queries, so queries like `select user_id ` will benefit from this feature. Also we normally push down query to our storage, so the query execution level will not suffer from large data batch transfer . It's different from systems based on parquet and HDFS plugin. So we also expect the query execution level to accept data more rapidly from the storage plugin to release the storage server resource as soon as possible. Otherwise the storage server level's execution pipeline will not be closed until the query level finished sending out all its data.
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