You Should Always Use a Custom DB Parameter Group When Creating an RDS Instance — Here’s How

Before spinning up a new Amazon RDS instance, it’s critical to first make sure you have a new custom DB parameter group ready to use with it. If you don’t, it might become necessary to perform an RDS instance restart to replace the default DB parameter group, even though the database parameter you’d like to change is modifiable and dynamic.

For AWS RDS instances, you manage your database engine configuration through the use of parameters in a DB parameter group. DB parameter groups act as a container for engine configuration values that are applied to one or more DB instances.

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