问题
The AWS document states that
Using Async in C# Functions with AWS Lambda
If you know your Lambda function will require a long-running process, such as uploading large files to Amazon S3 or reading a large stream of records from DynamoDB, you can take advantage of the async/await pattern. By creating a handler with this signature, Lambda will execute the function synchronously and wait a maximum of 5 minutes for execution to complete before returning or timing out.
I feel very confused Lambda will
execute the function synchronously and wait a maximum of 5 minutes
When Lambda support up to 15 minutes of processing time. Does that mean if I put async on the handler, I can only process one event in 5 minutes?
回答1:
The final answer of AWS support at the time:
- The document was not up to date. It should run at maximum 15 minute timeout ( depend on the Lambda function configuration )
- The async modifier does not change how AWS behave, they will just await it.
- The behaviour diference is only on the .NET side
回答2:
AWS recently changed the timeout for Lamdba. The execution timeout is changed from 5 minutes to 15 minutes.
https://aws.amazon.com/about-aws/whats-new/2018/10/aws-lambda-supports-functions-that-can-run-up-to-15-minutes/
来源：https://stackoverflow.com/questions/53953309/aws-lambda-async-c-sharp-handler