Did you keep the database from the monolith or did you split it into separate databases for each service?

In modern microservice architectures, it is common to avoid a shared database for all services to minimize coupling and increase service independence. Each service has its own database, allowing it to manage its data and schema independently, which also simplifies scaling and deployment.

However, in some cases, especially during migration from a monolith, a shared database may be maintained initially to ensure compatibility and a smooth transition. Over time, it is recommended to separate data and move to individual databases for each service.

Examples of separation:

• User service — a separate database with user and role tables
• Order service — a separate database with orders and statuses
• Payment service — a separate database for transactions

This approach improves isolation, increases fault tolerance, and facilitates the independent development of each service.