Understand the system from every dimension
Before you move a service off a shared database, Conera shows every other service still coupled to it, and the past breakage that should shape the migration sequence, capacity plan, and rollback.
If we move payment-service off PostgreSQL onto its own database, what else is coupled to that database today, and what has broken before when we changed it?
Conera
PostgreSQL is currently used by payment-service, checkout-service, and refund-service.
The last schema change caused a connection-pool exhaustion incident, resulting in service degradation.
These dependencies and previous operational issues must be considered to define the migration sequence, capacity requirements, and rollback plan before committing to the database split.
Coupling today
payment-service
AWS Direct Connect
Cross-Cloud Interconnect
checkout-service
refund-service
Azure Private Link
PostgreSQL
Azure Private Endpoint
Prior incident: schema change → connection-pool exhaustion → service degradation