On Tue, Sep 6, 2016 at 12:39 PM, Peter Geoghegan <p...@heroku.com> wrote:
> On Tue, Sep 6, 2016 at 12:08 AM, Heikki Linnakangas <hlinn...@iki.fi> wrote:
>>> I attach a patch that changes how we maintain the heap invariant
>>> during tuplesort merging.
>> Nice!
> Thanks!

BTW, the way that k-way merging is made more efficient by this
approach makes the case for replacement selection even weaker than it
was just before we almost killed it. I hate to say it, but I have to
wonder if we shouldn't get rid of the new-to-9.6
replacement_sort_tuples because of this, and completely kill
replacement selection. I'm not going to go on about it, but that seems
sensible to me.

Peter Geoghegan

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