Re: Use pread and pwrite instead of lseek + write and read

On Wed, Aug 17, 2016 at 9:40 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Oskari Saarenmaa <os@ohmu.fi> writes:
>> On my laptop a simple pgbench run (scale 100, 15 minutes) shows a 1.5%
>> performance improvement.
>
> I would have hoped for a lot better result before anyone would propose
> that we should deal with all the portability issues this'll create.
>
>> A 1.5% performance improvement is small but
>> measurable - and IMV more importantly it allows us to drop more than 100
>> lines of backwards (compatible?) code; maybe we could start targeting
>> more recent platforms in v10?
>
> That's basically nonsense: we'll end up adding way more than that to
> deal with platforms that haven't got these APIs.

I don't understand why you think this would create non-trivial
portability issues.

-- 
Robert Haas
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