Re: Bug in 9.6 tuplesort batch memory growth logic - Mailing list pgsql-hackers

Peter Geoghegan <pg@heroku.com> writes:
> On Tue, Sep 6, 2016 at 6:17 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> It doesn't seem to me that this limit has anything to do with anything,
>> and the comment claiming only that it's "noncritical" isn't helping.

> You've not understood the problem at all. The only thing that's
> critical is that the calculation not fail at all, through a later
> availMem that is < 0 (i.e. a LACKMEM() condition).

I see.  The comment could do with a bit of rewriting, perhaps.
        regards, tom lane