[scaling] section
Topics
Specifies settings that define how the compute nodes scale.
The format is [scaling .
   scaling-name]scaling-name must start with a letter, contain no more than 30 characters, and only
  contain letters, numbers, hyphens (-), and underscores (_).
[scaling custom] scaledown_idletime = 10
scaledown_idletime
  (Optional) Specifies the amount of time in minutes without a job, after which the compute node terminates.
This parameter isn't used if awsbatch is the scheduler.
The default value is 10.
scaledown_idletime = 10
Update policy: The compute fleet must be stopped for this setting to be changed for an update.