Re: Improving pg_dump performance when handling large numbers of LOBs

From: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
To: Ken Marshall <ktm(at)rice(dot)edu>, Andreas Joseph Krogh <andreas(at)visena(dot)com>
Cc: Wyatt Tellis <wyatt(dot)tellis(at)gmail(dot)com>, Ron Johnson <ronljohnsonjr(at)gmail(dot)com>, "pgsql-generallists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: Improving pg_dump performance when handling large numbers of LOBs
Date: 2024-02-05 20:52:16
Message-ID: 29401b0e-0d20-453b-bc9d-b67ced7e2be0@aklaver.com
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On 2/5/24 12:32, Ken Marshall wrote:
> On Mon, Feb 05, 2024 at 09:17:53PM +0100, Andreas Joseph Krogh wrote:
>>
>> På mandag 05. februar 2024 kl. 21:10:53, skrev Wyatt Tellis <
>> wyatt(dot)tellis(at)gmail(dot)com <mailto:wyatt(dot)tellis(at)gmail(dot)com>>:
>>
>> No, we don't have the ability to make schema changes and the schema in the
>> PG15 copy needs to match what's in the PG 12 versions
>>
>> Well then, I guess it boils down to how badly the ones in charge wants this
>> migration…
>>
>> --
>> Andreas Joseph Krogh
>> CTO / Partner - Visena AS
>> Mobile: +47 909 56 963
>> andreas(at)visena(dot)com <mailto:andreas(at)visena(dot)com>
>> www.visena.com <https://www.visena.com>
>> <https://www.visena.com>
>
> Hi,
>
> Can you use logical replication? Then you aren't under the gun to make
> a fast copy.

https://www.postgresql.org/docs/current/logical-replication-restrictions.html

"Large objects (see Chapter 35) are not replicated. There is no
workaround for that, other than storing data in normal tables."

>
> Regards,
> Ken
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com

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