Re: Questions on Upgrading PostgreSQL from 15.0 to 15.9 and Setting Up Streaming Replication - Mailing list pgsql-general

On 11/24/24 08:36, Subhash Udata wrote:
> The reason to upgrade from 15.0 to 15.9 is this
> https://www.postgresql.org/support/security/CVE-2024-10979/
> <https://www.postgresql.org/support/security/CVE-2024-10979/>
>
> Here it is mentioned that this vulnerability is fixed in 15.9
> So our organization wants an upgrade from 15.0 to 15.9

Sorry, I was not clear enough. When I said 'Why?' it was not referring
to reason you wanted to upgrade, it was why go through the whole
pg_basebackup process. Read this link:

https://www.postgresql.org/support/versioning/

for why that is not necessary.

>
> On Sun, 24 Nov 2024 at 21:48, Adrian Klaver <adrian.klaver@aklaver.com
> <mailto:adrian.klaver@aklaver.com>> wrote:
>
>     On 11/24/24 08:05, Subhash Udata wrote:
>      > Dear PostgreSQL Community,
>      >
>      > I have a production database setup with a primary server and a
>     standby
>      > server. The database is currently running on *PostgreSQL 15.0*,
>     and I
>      > plan to upgrade both servers to *15.9*.
>      >
>      > I have the following questions regarding the upgrade and replication
>      > process:
>      >
>      >  1.
>      >
>      >     *Upgrade and Replication Compatibility*:
>      >
>      >       * My plan is to perform a failover, promote the standby server
>      >         (currently 15.0) to primary, and then upgrade the old primary
>      >         server to version 15.9.
>      >       * After upgrading the old primary server to version 15.9, I
>     want
>      >         to configure it as a standby server and set up streaming
>      >         replication with the new primary server, which will still be
>      >         running version 15.0.
>      >       * Is it possible to establish streaming replication between
>     these
>      >         two versions (*15.0* as primary and *15.9* as standby)?
>      >  2.
>      >
>      >     *Efficient Replication Setup*:
>      >
>      >       * The production database is around *1TB in size*, and creating
>      >         replication using |pg_basebackup| is taking more than 2–3
>     hours
>      >         to complete.
>      >       * Is there an alternative method to set up replication without
>      >         taking a full backup of the entire cluster but instead using
>      >         only the WAL files that have changed on both servers?
>
>     Why?
>
>     15.0 --> 15.9(actually you want the latest release 15.10) is a minor
>     upgrade it involves shutting down the servers installing the new
>     version
>     binaries on each and restarting them.
>
>     You should read:
>
>     https://www.postgresql.org/support/versioning/
>     <https://www.postgresql.org/support/versioning/>
>
>     It would be a good idea to go through the Release Notes here:
>
>     https://www.postgresql.org/docs/15/release.html
>     <https://www.postgresql.org/docs/15/release.html>
>
>     To see what changed.
>
>      >
>      > Your guidance and recommendations on these questions will be greatly
>      > appreciated.
>      >
>      > Thank you for your time and support!
>      >
>      > Best regards,
>      >
>      > Subhash
>      >
>
>     --
>     Adrian Klaver
>     adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
>

--
Adrian Klaver
adrian.klaver@aklaver.com