Re: Parallel query and temp_file_limit

From: Peter Geoghegan <pg(at)heroku(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Parallel query and temp_file_limit
Date: 2016-07-05 19:07:20
Message-ID: CAM3SWZQz_Q9VD2GzzG2F5SaOUxFDsAuvaEP-haOMtOuVdnG8-A@mail.gmail.com
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On Tue, Jul 5, 2016 at 12:00 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> I think that it is not worth mentioning specifically for
> temp_file_limit; to me that seems to be a hole with no bottom. We'll
> end up arguing about which GUCs should mention it specifically and
> there will be no end to it.

I don't think that you need it for any other GUC, so I really don't
know why you're concerned about a slippery slope. The only other
resource GUC that is scoped per session that I can see is
temp_buffers, but that doesn't need to change, since parallel workers
cannot use temp_buffers directly in practice. max_files_per_process is
already clearly per process, so no change needed there either.

I don't see a case other than temp_file_limit that appears to be even
marginally in need of a specific note.

--
Peter Geoghegan

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