I have an application load balancer that routes traffic to two EC2 instances in a target group. The application load balancer periodically checks the availability of the EC2 instances by doing a health check. It makes a request to a healthcheck endpoint and when it gets status code 200 it knows the instance is still functioning.
The default interval for these healthchecks is 30 seconds, but i thought that was a bit too long so i've set the health check interval to 5 seconds instead. This made me wonder; do these health checks cost money? Is it more expensive to do health checks every 5 seconds as opposed to the default 30 seconds? I would also like to know what the optimal healthcheck interval would be when processing requests for a social media website.
Thanks
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Where does it say that health checks aren't counted towards LCU? That page doesn't mention health checks anywhere
The page does not explicitly say it however if you see (for example): https://calculator.aws/#/addService/Route53 for the R53 healthcheck there are charges based on Basic, Optional, Fast interval, latency etc for the HCs; same is not the case if you check ELB.