Re: BitmapHeapScan streaming read user and prelim refactoring

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От Melanie Plageman
Тема Re: BitmapHeapScan streaming read user and prelim refactoring
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Msg-id CAAKRu_Zv08Cic=qdCfzrQabpEXGrd9Z9UOW5svEVkCM6=FXA9g@mail.gmail.com
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Ответ на Re: BitmapHeapScan streaming read user and prelim refactoring  (Melanie Plageman <melanieplageman@gmail.com>)
Список pgsql-hackers
On Mon, Mar 10, 2025 at 3:06 PM Melanie Plageman
<melanieplageman@gmail.com> wrote:
>
> I ran some experiments on master with datasets and access patterns
> derived from Tomas' original bitmap heap scan benchmarking scripts to
> try and identify a good default effective IO concurrency value on
> master.

I've attached one more set of charts for cloud storage that includes
effective_io_concurrency 0 (no prefetching) so that you can see that 0
is actually better than the current default of 1.

- Melanie

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