[GitHub] [incubator-druid] ccaominh commented on issue #6993: [Proposal] Dynamic prioritization and laning

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ccaominh commented on issue #6993: [Proposal] Dynamic prioritization and laning
URL: https://github.com/apache/incubator-druid/issues/6993#issuecomment-533671743
 
 
   I'm planning to implement this proposal.
   
   I think one potential area is of future improvement (that @sascha-coenen already alluded to), is allowing queries to move between lanes. For example, the heuristics mentioned may misidentify a heavy query as a light one, which may cause starvation of later light queries. In this case, the heavy query could possible be moved to the correct lane after it's consumed too many resources. Similarly, if a light query is initially misidentified as a heavy one, its priority would need to be corrected either before timing out or when it is retried later.

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