These descriptions only apply to environments using basic health reporting. See Health colors and statuses for details related to enhanced health.. Elastic Load Balancing health checks. In a load-balanced environment, Elastic Load Balancing sends a request to each instance in an environment every 10 seconds to confirm that instances are healthy.
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.healthstatus.html

