Hi, On 2017-11-15 13:48:18 -0500, Robert Haas wrote: > I think that we need a little bit deeper analysis here to draw any > firm conclusions.
Indeed. > I suspect that one factor is that many of the queries actually send > very few rows through the Gather. Yep. I kinda wonder if the same result would present if the benchmarks were run with parallel_leader_participation. The theory being what were seing is just that the leader doesn't accept any tuples, and the large queue size just helps because workers can run for longer. Greetings, Andres Freund
