kfaraz commented on PR #20708:
URL: https://github.com/apache/druid/pull/20708#issuecomment-6460439549

   >> Once a taskCount has been chosen, commit to it and let it become stable.
   
   > Here where my concern is risen. Do we want to commit to unlucky choice at 
the beginning, while the general design should be tied to [task amount] 
cost-efficiency?
   
   @Fly-Style , we commit to a given taskCount only until the next 
minScaleUpDelay or minScaleDownDelay or taskDuration elapses. In other words, 
there is no change in this aspect.
   
   Sorry for the confusion. By commit, I only meant that the next time when we 
do a scale action, we evaluate the _overall_ impact of the last choice for 
however long it has run instead of just the latest metrics (which shows the 
picture for only the last minute or less). Thus we avoid half baked decisions.


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