How is working with a database in Java organized under high load?

Question

Java

Hello, you need to make / get records in the database in Java (increment the value and get the resulting amounts), but there is a condition - this should work under high load. Here the question is in the architecture of the application or in the choice of the database? If in the architecture, then there are probably some tools or tricks for working with a high load.
What you need to read / study in order to understand the issue. I would be grateful if you could tell me where to start.