outline
AWS RDS can change parameters using custom parameter groups. There are parameters which reqiured rebooting or not.
Aurora MySQL parameters
how-to-check
Parameter Group
Apply type Dynamic - No reboot required
Apply type Static - Reboot required
AWS CLI
## list parameters aws rds describe-db-cluster-parameters --db-cluster-parameter-group-name test_parameter_group ## list parameters only with Apply type aws rds describe-db-parameters --db-parameter-group-name test_parameter_group --query "Parameters[*].[ParameterName,ApplyType]"
reference
https://repost.aws/knowledge-center/rds-parameter-group-update-issues