Teodor Sigaev <teodor(at)sigaev(dot)ru> writes:
>> Yeah, I'm not convinced either. Still, Teodor's theory should be easily
>> testable: set synchronize_seqscans to FALSE and see if the problem goes
>> away.
> Test suit to reproduce the problem:
I don't doubt that you're describing a real effect, I'm just not sure
yet that it's the same thing Ivan is seeing. He seems to be talking
about more than 4x differences.
regards, tom lane