Assume you‘ll use Amazon Route53 as your DNS provider. You‘ll pay per lookup after some free-tier so doubling your TTL from 5min to 10min halfes your cost [1] .

Assume you‘ll use Amazon Route53 as your DNS provider. You‘ll pay per lookup after some free-tier so doubling your TTL from 5min to 10min halfes your cost [1] . Sure, it‘s ~$0.40 / million requests but if you have a TTL of a few minutes and a often-accessed site you‘ll have some requests per day. [1] https://aws.amazon.com/route53/pricing/?nc1=h_ls https://aws.amazon.com/route53/pricing/?nc1=h_ls