Horton

Re: Can we get rid of repeated queries from pg_dump?

hubert depesz lubaczewski <depesz@depesz.com>

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From: hubert depesz lubaczewski <depesz@depesz.com>
To: Adrian Klaver <adrian.klaver@aklaver.com>
Cc: pgsql-general <pgsql-general@lists.postgresql.org>
Date: 2021-08-26T14:35:43Z
Lists: pgsql-hackers, pgsql-general 
On Thu, Aug 26, 2021 at 07:34:26AM -0700, Adrian Klaver wrote:
> On 8/26/21 1:44 AM, hubert depesz lubaczewski wrote:
> > Hi,
> > I have following case: local pg_dump (v15) connecting to remote
> > PostgreSQL (v12).
> So you are using a dev version of pg_dump or is that a typo?

Yes. I'm running pg_dump from my computer to (very) remote db server.

> > It's been 15 minutes, and pg_dump (called: pg_dump -v -s -f schema.dump,
> > with env variables configuring db connection) hasn't written even single
> > byte to schema.dump)
> What happens if you run without the -v?

Well, I guess it works, but with no output I can't judge how fast.
Definitely doesn't seem to be going any faster.

Best regards,

depesz

Commits

  1. In pg_dump, avoid doing per-table queries for RLS policies.

  2. Cache the results of format_type() queries in pg_dump.