The performance_schema_* configuration variables do not apply to RDS. #412
Description
The root cause of the problem is that the value for the performance_schema variable is set to 0 by default in the Parameter Group, so Amazon RDS does not apply the performance_schema_* variables, but performance_schema is enabled in the database through the Performance Insights feature. To apply the performance_schema_* variables, you need to set the value for performance_schema to 1 in the Parameter Group linked to the database.