Export operation efficiency in read replica

From: Siraj G <tosiraj(dot)g(at)gmail(dot)com>
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Export operation efficiency in read replica
Date: 2025-03-20 11:52:21
Message-ID: CAC5iy60ZzcsxL1GKAdUdiqA7TFv_yQW3ZkN07VJM8J1Xkdk8Gg@mail.gmail.com
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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

What would be the RPO of such backup?
What would be the impact on the READ REPLICA with a long running export
operation?

Thank you!
Siraj

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