SQL database scaling: can it be configured in Spring Boot?

Question

PostgreSQL

The application has a postgresql database, and I need to ensure the fastest response to requests and maximum reliability (availability and avoidance of data loss).
I read about the possibilities of database replication (master-slave-widness), as well as about partitions for the purpose of scaling. But as a developer, I haven’t figured out how to technically set it up.
I would be very grateful for advice and useful sources with examples.

Answer 1

First, you don't have to configure it in any way, as a developer, the DBA must configure the DBMS. Secondly, you'll forgive me, but by the time the system level reaches the level of scaling at least the DBMS, it needs professionals with at least ten years of experience, which you obviously do not have. Many systems never get to this level at all.

Are you sure yours arrived?