# Parameter groups for Amazon Aurora
<a name="USER_WorkingWithParamGroups"></a>

*Database parameters* specify how the database is configured. For example, database parameters can specify the amount of resources, such as memory, to allocate to a database.

You manage your database configuration by associating your DB instances and Aurora DB clusters with parameter groups. Aurora defines parameter groups with default settings. You can also define your own parameter groups with customized settings.

**Topics**
+ [Overview of parameter groups](parameter-groups-overview.md)
+ [DB cluster parameter groups for Amazon Aurora DB clusters](USER_WorkingWithDBClusterParamGroups.md)
+ [DB parameter groups for Amazon Aurora DB instances](USER_WorkingWithDBInstanceParamGroups.md)
+ [Comparing DB parameter groups](USER_WorkingWithParamGroups.Comparing.md)
+ [Specifying DB parameters](USER_ParamValuesRef.md)