A sudden spike in one function causes other important functions to throttle.
Reserve a minimum concurrency level for the critical function and isolate the competition.
Which setting is most appropriate?
Configure Reserved Concurrency on the critical function to reserve and limit its concurrency allocation.
Detailed explanation
Reserved Concurrency protects a function's allocation and limits its competition with other functions.
Reserved Concurrency protects a function's allocation and limits its competition with other functions.
S3 versioning preserves objects and does not control Lambda concurrency.
S3 versioning preserves objects and does not control Lambda concurrency.
Unbounded demand can exhaust the account limit and overload downstream services.
Unbounded demand can exhaust the account limit and overload downstream services.
DNS health checks do not reserve Lambda execution capacity.
DNS health checks do not reserve Lambda execution capacity.
Check official documentation
Compare the following points with the official documentation.
AWS Lambda reserved concurrencyの公式説明を確認する。
What to confirm
ReservedとProvisioned Concurrencyの目的を区別できる。
Key points
- Reserved Concurrency
- Concurrency allocation
- Throttling
Notes
- Environment: AWS公式SOA-C03試験ガイドとAWS公式ドキュメントの確認
- Confirm current AWS service behavior in the official documentation.
Foundation review
Isolation
A reserved allocation protects the critical function but also sets its upper bound.
Downstream safety
A limit can protect databases and other dependencies from unbounded parallel work.