Aurora Serverless v2 Adds Zero-Capacity Scaling for True Serverless
Briefly

"For workloads that can tolerate a resume time of approximately 15 seconds, you can use this feature in the following cases: clusters used for development and testing and applications where a cold start is acceptable while the database resumes."
"Perhaps one of the biggest announcements was that Amazon Aurora Serverless v2 now supports scaling to zero capacity... there's still a 15 second cold start, but unless you have highly predictable traffic patterns, I wouldn't enable this in production."
Read at InfoQ
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