If downtime is an not an option, Lambda is not the solution. Amazon will automatically shut down instances of your Lambda if they haven't been used (~5-15 minu

If downtime is an not an option, Lambda is not the solution. Amazon will automatically shut down instances of your Lambda if they haven't been used (~5-15 minutes), and starting a fresh Lambda has noticeable latency. So, some people have resorted to periodically querying their Lambda to prevent this. However, occasionally Amazon will reset all Lambdas, which will force the hard restart.