Date: Sat, 28 Aug 2021 08:38:24 +0200
From: hubert depesz lubaczewski <depesz@depesz.com>
Sender: depesz@depesz.com
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Laurenz Albe <laurenz.albe@cybertec.at>,
	pgsql-general <pgsql-general@lists.postgresql.org>
Subject: Re: Can we get rid of repeated queries from pg_dump?
Message-ID: <20210828063824.GA11579@depesz.com>
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On Fri, Aug 27, 2021 at 05:23:23PM -0400, Tom Lane wrote:
> I experimented with the attached, very quick-n-dirty patch to collect
> format_type results during the initial scan of pg_type, instead.  On the
> regression database in HEAD, it reduces the number of queries pg_dump
> issues from 3260 to 2905; but I'm having a hard time detecting any net
> performance change.
> (This is not meant for commit as-is; notably, I didn't bother to fix
> getTypes' code paths for pre-9.6 servers.  It should be fine for
> performance testing though.)

Hi,
thanks a lot for this. Will test and report back, most likely on Monday,
though.

Best regards,

depesz