Re: Parallel query and temp_file_limit

Peter Geoghegan <pg(at)heroku(dot)com> writes:
> On Wed, May 18, 2016 at 3:40 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> What I'm tempted to do is trying to document that, as a point of
>> policy, parallel query in 9.6 uses up to (workers + 1) times the
>> resources that a single session might use. That includes not only CPU
>> but also things like work_mem and temp file space. This obviously
>> isn't ideal, but it's what could be done by the ship date.

> Where would that be documented, though? Would it need to be noted in
> the case of each such GUC?

Why can't we just note this in the number-of-workers GUCs? It's not like
there even *is* a GUC for many of our per-process resource consumption
behaviors.

regards, tom lane