Best practise: Use 28 seconds as go to Lambda timeout

[victorskl]

The Lambda timeout is, by default, 3 seconds. If this is ok for your task, please go for it.

Else it is advised to use 28s rule. This magic value is coming from the empirical observation from years of our current Portal operation.

Often, the data processing Lambda require more than 28 seconds. Then, please adjust your runtime requirement gradually. Just be critical and, think twice - to see whether you could improve the communication by leveraging async comm and, use Q when it makes sense.

If for the purpose of Lambda error and exception handling, please leverage its DLQ (to SQS Q) and, alarm when appropriate.