stevenao

[1] https://aws.amazon.com/rds/aurora/details/postgresql-details/
[2] https://docs.microsoft.com/en-us/azure/postgresql/concepts-high-availability

AWS 
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High Availability and Durability
Instance Monitoring and Repair
Amazon RDS continuously monitors the health of your Amazon Aurora database and underlying EC2 instance. In the event of database failure, Amazon RDS will automatically restart the database and associated processes. Amazon Aurora does not require crash recovery replay of database redo logs, greatly reducing restart times. Amazon Aurora also isolates the database buffer cache from the database process, allowing the cache to survive a database restart.

Multi-AZ Deployments with Aurora Replicas