[GitHub] [spark] liupc commented on issue #27871: [SPARK-31105][CORE]Respect sql execution id for FIFO scheduling mode

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liupc commented on issue #27871: [SPARK-31105][CORE]Respect sql execution id for FIFO scheduling mode
URL: https://github.com/apache/spark/pull/27871#issuecomment-601598502
 
 
   > For small queries, usually they won't hit this problem. For big queries, the query latency shouldn't matter too much?
   > 
   > @liupc have you tried this in real-world workloads?
   
   Yes, we tried in real workloads, it does better especially there are lots of taskSets to be scheduled for one round scheduling. This is obvious for adaptive execution. Also, I think this is what FIFO should do.
   usually queries may mapping to several jobs, if several jobs being delayed due to this reason, the total delay is obvious. 

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