Re: Logical to physical page mapping - Mailing list pgsql-hackers

From Claudio Freire
Subject Re: Logical to physical page mapping
Date
Msg-id CAGTBQpZ5ZRDPbo1ZjH7fogv1Se2PhS=J6otk35LGN8aDH3ESzw@mail.gmail.com
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In response to Re: Logical to physical page mapping  (Heikki Linnakangas <hlinnakangas@vmware.com>)
Responses Re: Logical to physical page mapping  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
On Sat, Oct 27, 2012 at 3:41 PM, Heikki Linnakangas
<hlinnakangas@vmware.com> wrote:
>
>> I think you're just moving the atomic-write problem from the data pages
>> to wherever you keep these pointers.
>
>
> If the pointers are stored as simple 4-byte integers, you probably could
> assume that they're atomic, and won't be torn.

That could backfire.



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