Re: Optimize kernel readahead using buffer access strategy

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От Claudio Freire
Тема Re: Optimize kernel readahead using buffer access strategy
Дата
Msg-id CAGTBQpb6ZxHyC0v6AfHyyv=erC4rsyDbp6u7EZoYLt1eAeF-hA@mail.gmail.com
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Ответ на Re: Optimize kernel readahead using buffer access strategy  (KONDO Mitsumasa <kondo.mitsumasa@lab.ntt.co.jp>)
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On Tue, Jan 14, 2014 at 8:58 AM, KONDO Mitsumasa
<kondo.mitsumasa@lab.ntt.co.jp> wrote:
>
> In my past patch, it is significant bug which is mistaken caluculation of
> offset in posix_fadvise():-( However it works well without problem in
> pgbench.
> Because pgbench transactions are always random access...


Did you notice any difference?

AFAIK, when specifying read patterns (ie, RANDOM, SEQUENTIAL and stuff
like that), the offset doesn't matter. At least in linux.

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