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Lambda Monitoring

Links: 114 AWS SOA Index

CloudWatch Metrics

  • Invocations - number of times your function is invoked (success/failure)
  • Duration - amount of time your function spends processing an event
  • Errors - number of invocations that result in a function error
  • Throttles - number of invocation requests that are throttled (no concurrency available)
  • DeadLetterErrors - number of times Lambda failed to send an event to a DLQ (async invocations)
  • IteratorAge - time between when a Stream receives a record and when the Event Source Mapping sends the event to the function (for Event Source Mapping that reads from Stream)
  • ConcurrentExecutions - number of function instances that are processing events
We can build alarms on top of these metrics.

For example if throttles > 0 then our lambdas are getting throttled or if the errors > 0 then there are function errors.

  • We can use CloudWatch insights to search through all the CloudWatch logs.

Lambda Insights

  • Collects, aggregates, and summarises:
    • System-level Metrics - CPU time, memory, disk, network
    • Diagnostic Information - cold starts, Lambda worker shutdowns
  • It will be collected from the lambda and will be sent to lambda-insights log group.
  • We must the CloudWatch Lambda extension for insights as a lambda layer.

Last updated: 2023-03-03