On 4 January 2017 at 13:57, Robert Haas <robertmhaas@gmail.com> wrote:
> On Wed, Jan 4, 2017 at 3:05 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
>> Strange response. Nothing has been assumed. I asked for tests and you
>> provided measurements.
>
> Sure, of zero-filling a file with dd. But I also pointed out that in
> a real PostgreSQL cluster, the change could actually *reduce* latency.
I think we are talking at cross purposes. We agree that the main
change is useful, but it causes another problem which I can't see how
you can characterize as reduced latency, based upon your own
measurements.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services