Re: Export operation efficiency in read replica

On Thu, Mar 20, 2025 at 7:52 AM Siraj G <tosiraj(dot)g(at)gmail(dot)com> wrote:

> Hello Experts!
>
> I have a DB with 1TB in size serving needs of one of our critical
> applications. I have a requirement to take export of the DB on a daily
> basis, but want to carry out this operation in read replica. The postgresql
> version is: 16.6
>

Use PgBackRest from the streaming replica.

> What would be the RPO of such backup?
>

Are you asking how long it takes to restore the backup back to the primary?

> What would be the impact on the READ REPLICA with a long running export
> operation?
>

Why not use the standby server (aka "read replica") as the hot standby in
case the Primary crashes hard?

Then pg_basebackup (or PgBackRest) to get the database back to the primary
once it's back up.

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