Re: Parallel Seq Scan vs kernel read ahead

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От Robert Haas
Тема Re: Parallel Seq Scan vs kernel read ahead
Дата
Msg-id CA+TgmoYG-u4WTB1XV6cSei-s2Jdde13d2yUtbenLH66eMAPYcw@mail.gmail.com
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Ответ на Re: Parallel Seq Scan vs kernel read ahead  (David Rowley <dgrowleyml@gmail.com>)
Ответы Re: Parallel Seq Scan vs kernel read ahead  (David Rowley <dgrowleyml@gmail.com>)
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On Thu, Jun 18, 2020 at 6:15 AM David Rowley <dgrowleyml@gmail.com> wrote:
> With a 32TB relation, the code will make the chunk size 16GB.  Perhaps
> I should change the code to cap that at 1GB.

It seems pretty hard to believe there's any significant advantage to a
chunk size >1GB, so I would be in favor of that change.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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