Re: 16-bit page checksums for 9.2

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От Simon Riggs
Тема Re: 16-bit page checksums for 9.2
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Msg-id CA+U5nMK9xVMb69UPnseQ5pjnUuh85NW+daREFayjgZ8FXj1WUg@mail.gmail.com
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Ответ на Re: 16-bit page checksums for 9.2  (Stephen Frost <sfrost@snowman.net>)
Ответы Re: 16-bit page checksums for 9.2  (Andres Freund <andres@anarazel.de>)
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On Fri, Jan 6, 2012 at 1:10 AM, Stephen Frost <sfrost@snowman.net> wrote:
> * Simon Riggs (simon@2ndQuadrant.com) wrote:
>> I discover that non-all-zeroes holes are fairly common, just not very frequent.
>
> Curious, might be interesting to find out why.
>
>> That may or may not be a problem, but not something to be dealt with
>> here and now.
>
> But I agree that it's not the job of this patch/effort.  It sounds like
> we have clear indication, however, that those areas, as they are not
> necessairly all zeros, should be included in the checksum.

Disagree. Full page writes ignore the hole, so its appropriate to do
so here also.

--
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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