Sorry for top-posting -- blame apple.
Isn't this just a good description of exactly how it works today?
--
Greg
On 24 Mar 2009, at 20:51, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Sam Mason <sam@samason.me.uk> writes:
>> The conceptual idea is to have at most one outstanding flush for the
>> log going through the filesystem at any one time.
>
> I think this is a variant of the "group commit" or "commit delay"
> stuff that's already in there (and doesn't work real well :-().
> The problem is to sync multiple transactions without a lot of extra
> overhead.
>
> Realize also that if the kernel's not completely brain dead, some
> of this happens already by virtue of the fact that everyone's
> fsync'ing the same WAL file.
>
> regards, tom lane
>
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