Re: Guidance Needed for PostgreSQL Upgrade from 12 to 15

From: Motog Plus <mplus7535(at)gmail(dot)com>
To: Ron Johnson <ronljohnsonjr(at)gmail(dot)com>
Cc: Pgsql-admin <pgsql-admin(at)lists(dot)postgresql(dot)org>
Subject: Re: Guidance Needed for PostgreSQL Upgrade from 12 to 15
Date: 2024-11-18 17:19:54
Message-ID: CAL5Gnitdyw7vCp4-0whmmJ-RC7Z9yQVx=xrtfQO6-Lxcfvqrqw@mail.gmail.com
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Thanks Ron for your suggestion.
So for pg upgrade in streaming replication setup, rsync will be a better
option for standby upgrade if we are using --link option or recreating the
standby, once upgrade completes on primary? Any suggestions on this please.

Best Regards,
Raman

On Mon, Nov 18, 2024, 22:41 Ron Johnson <ronljohnsonjr(at)gmail(dot)com> wrote:

> On Mon, Nov 18, 2024 at 11:08 AM Motog Plus <mplus7535(at)gmail(dot)com> wrote:
>
>> Dear Team,
>>
>> We are in the process of upgrading our PostgreSQL database from version
>> 12 to version 15. I would greatly appreciate your advice on the following:
>>
>> 1. Would it be recommended to use the --link option with the pg_upgrade
>> command, from disk space point of view?
>>
>
> Yes.
>
>
>> Are there any potential downsides to consider?
>>
>
> Very much: it's a one-way journey. No rolling back if something
> goes wrong!
>
>
>> 2. Do you have any suggestions or best practices for performing an
>> efficient upgrade in a replication setup (streaming replication) for both
>> the primary and standby servers?
>>
>
> Streaming replication is not an upgrade method. Logical replication is
> absolutely a valid method of upgrading PG on one server to PG on a
> different server.
>
> --
> Death to <Redacted>, and butter sauce.
> Don't boil me, I'm still alive.
> <Redacted> lobster!
>

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