Luke Lonergan wrote:
Mark,
It would be nice to put some tracers into the executor and see where the
time is going. I'm also curious about the impact of the new 8.1 virtual
tuples in reducing the executor overhead. In this case my bet's on the agg
node itself, what do you think?
Yeah - it's pretty clear that the count aggregate is fairly expensive
wrt cpu - However, I am not sure if all agg nodes suffer this way (guess
we could try a trivial aggregate that does nothing for all tuples bar
the last and just reports the final value it sees).
Cheers
Mark
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