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From: hubert depesz lubaczewski <depesz@depesz.com>
To: Artem Tomyuk <admin@leboutique.com>
Cc: Keith <keith@keithf4.com>
Cc: pgsql-admin <pgsql-admin@postgresql.org>
Subject: Re: how to shrink pg_attribute table in some database
Date: Mon, 26 Mar 2018 17:33:37 +0200
Message-ID: <20180326153337.GA8484@depesz.com> (raw)
In-Reply-To: <CANYYVqJn8pxN-YU4C7Y=u1nxrqzmWwwz4bXLFs6_JbQwpiTggA@mail.gmail.com>
References: <CANYYVqKwgR8TK6ar54vbXLc01KH-_ppM=qh6GLQ6edmmexX-EQ@mail.gmail.com>
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	<20180326141756.GB708@depesz.com>
	<CANYYVq+5Og_e=d4h4uvuh3s-e1PfdR5t1QeStPKoR24q_DdZfw@mail.gmail.com>
	<20180326152425.GA23643@depesz.com>
	<CANYYVqJn8pxN-YU4C7Y=u1nxrqzmWwwz4bXLFs6_JbQwpiTggA@mail.gmail.com>

On Mon, Mar 26, 2018 at 06:32:25PM +0300, Artem Tomyuk wrote:
> Thanks,
> 
> as we understand there is a lack of autovacuum max workers in
> postgresql.conf.

that is a contributing factor. but the sheer size of this table means
that something is doing something very bad in your application.

> 
> One question more, what impact would be on streaming replication? Will full
> vacuum create extra wal files during full vacuum?

Yes it will - in the size of new table.

Best regards,

depesz





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