Lambda Observability
Every invoke emits stdout/stderr to a CloudWatch log group plus built-in metrics (Invocations, Errors, Duration, Throttles, ConcurrentExecutions); structured JSON logs make them queryable with Logs Insights. X-Ray or OTel tracing stitches the API Gateway to Lambda to downstream-call chain so you can attribute latency to Init versus handler versus dependencies.
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Every invoke emits stdout/stderr to a CloudWatch log group plus built-in metrics (Invocations, Errors, Duration, Throttles, ConcurrentExecutions); structured JSON logs make them queryable with Logs Insights. X-Ray or OTel tracing stitches the API Gateway to Lambda to downstream-call chain so you can attribute latency to Init versus handler versus dependencies.
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