From: Nathan Bossart <nathandbossart@gmail.com>
To: Michael Paquier <michael@paquier.xyz>
Cc: Euler Taveira <euler@eulerto.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: improve performance of pg_dump with many sequences
Date: Tue, 16 Jul 2024 22:23:08 -0500
Message-ID: <Zpc5HGb7yDfTNDy5@nathan> (raw)
In-Reply-To: <ZpcsrAcClLt7AwdI@paquier.xyz>
References: <20240503025140.GA1227404@nathanxps13>
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<ZpcsrAcClLt7AwdI@paquier.xyz>
On Wed, Jul 17, 2024 at 11:30:04AM +0900, Michael Paquier wrote:
> Yeah, I have bumped on the same issue. In the long term, I also think
> that we'd better have pg_sequence_last_value() return a row with
> is_called and the value scanned. As you say, it won't help except
> when upgrading from versions of Postgres that are at least to v18,
> assuming that this change gets in the tree, but that would be much
> better in the long term and time flies fast.
AFAICT pg_sequence_last_value() is basically an undocumented internal
function only really intended for use by the pg_sequences system view, so
changing the function like this for v18 might not be out of the question.
Otherwise, I think we'd have to create a strikingly similar function with
slightly different behavior, which would be a bizarre place to end up.
--
nathan
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To: pgsql-hackers@postgresql.org
Cc: nathandbossart@gmail.com, michael@paquier.xyz, euler@eulerto.com
Subject: Re: improve performance of pg_dump with many sequences
In-Reply-To: <Zpc5HGb7yDfTNDy5@nathan>
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