imay commented on issue #242: Poor query performance under high concurrence URL: https://github.com/apache/incubator-doris/issues/242#issuecomment-429769400 According to query profile, I see DataStreamSender use most time. For Instance a37b604526e49e4:8cc515f4acd8773c, DataStreamSender use 7s180ms and OLAP_SCAN_NODE just use 117.305ms。 so there may be some problem in DataStreamSender What's the version of Doris you test
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