• outline

AWS RDS can change parameters using custom parameter groups. There are parameters which reqiured rebooting or not.

• Aurora MySQL parameters

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Reference.ParameterGroups.html

• 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