This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: December 31, 2025.Enable the default instance warmup
for a group
You can enable the default instance warmup when you create an Auto Scaling group. You can
also enable it for existing groups.
By enabling the default instance warmup feature, you no longer have to specify
values for warmup parameters for the following features:
- Console
-
To enable the default instance warmup for a new group
(console)
When you create the Auto Scaling group, on the Configure
advanced options page, under Additional
settings, select the Enable default
instance warmup option. Choose the warmup time that
you need for your application.
- AWS CLI
-
To enable the default instance warmup for a new group
(AWS CLI)
To enable the default instance warmup for an Auto Scaling group, add the
--default-instance-warmup option and specify a
value, in seconds, from 0 to 3600. After it's enabled, a value of
-1 will turn this setting off.
The following create-auto-scaling-group command creates an Auto Scaling group
with the name my-asg and enables the default
instance warmup with a value of 120
seconds.
aws autoscaling create-auto-scaling-group --auto-scaling-group-name my-asg --default-instance-warmup 120
If this command throws an error, make sure that you have updated
the AWS CLI locally to the latest version.
- Console
-
To enable the default instance warmup for an existing group
(console)
Open the Amazon EC2 console at
https://eusc-de-east-1.console.amazonaws-eusc.eu/ec2/, and choose Auto Scaling Groups from the navigation pane.
-
On the navigation bar at the top of the screen, choose the
AWS Region that you created your Auto Scaling group in.
-
Select the check box next to the Auto Scaling group.
A split pane opens up in the bottom of the page.
-
On the Details tab, choose
Advanced configurations,
Edit.
-
For Default instance warmup, choose the
warmup time that you need for your application.
-
Choose Update.
- AWS CLI
-
To enable the default instance warmup for an existing group
(AWS CLI)
The following example uses the update-auto-scaling-group command to enable the default
instance warmup with a value of 120
seconds for an existing Auto Scaling group named
my-asg.
aws autoscaling update-auto-scaling-group --auto-scaling-group-name my-asg --default-instance-warmup 120
If this command throws an error, make sure that you have updated
the AWS CLI locally to the latest version.