Re: Horribly slow pg_upgrade performance with many Large Objects

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: Jan Wieck <jan(at)wi3ck(dot)info>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Horribly slow pg_upgrade performance with many Large Objects
Date: 2025-04-09 17:04:21
Message-ID: Z_aolVLRe8PoPht_@nathan
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On Tue, Apr 08, 2025 at 05:37:50PM -0400, Jan Wieck wrote:
> I remember an incident where large amounts of LOs ran pg_upgrade into a
> transaction-ID wrap around because the restore part would create individual
> single statement transactions per LO to create, then change permissions and
> ownership and finally fill in the data. Could that be related here?

I believe commits 74cf7d4 and 959b38d have largely fixed that problem.

--
nathan

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