Re: Anything to be gained from a 'Postgres Filesystem'?

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От Tom Lane
Тема Re: Anything to be gained from a 'Postgres Filesystem'?
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Msg-id 29577.1099601151@sss.pgh.pa.us
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Ответ на Re: Anything to be gained from a 'Postgres Filesystem'?  (Simon Riggs <simon@2ndquadrant.com>)
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Simon Riggs <simon@2ndquadrant.com> writes:
> On Thu, 2004-11-04 at 19:34, Tom Lane wrote:
>> But only for Postgres' own shared buffers.  The kernel cache still gets
>> trashed, because we have no way to suggest to the kernel that it not
>> hang onto the data read in.

> I guess a difference in viewpoints. I'm inclined to give most of the RAM
> to PostgreSQL, since as you point out, the kernel is out of our control.
> That way, we can do what we like with it - keep it or not, as we choose.

That's always been a Bad Idea for three or four different reasons, of
which ARC will eliminate no more than one.

            regards, tom lane

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