Application Load Balancers now support a slow start mode that allows you to add new targets without overwhelming them with a flood of requests. With the slow start mode, targets warm up before accepting their fair share of requests based on a ramp-up period that you specify.
Slow start is very useful for applications that depend on cache and need a warm-up period before being able to respond to requests with optimal performance.
Slow start mode can be enabled by target group and can be configured for a duration of 30 seconds to 15 minutes. The load balancer linearly increases the number of requests sent to a new target in a target group up to its fair share during the slow start ramp-up window.
Slow start is available today for all existing and new Application Load Balancers in all AWS public regions. You can get started using the AWS Management Console , AWS Command Line Interface (CLI) , or AWS SDK . To learn more, see slow start mode .