By default there's a index which indexes all instances of a certain type. When you never query this type and only access it by navigation, you can safely disable this index.
IEmbeddedConfiguration configuration = Db4oEmbedded.NewConfiguration(); configuration.Common.ObjectClass(typeof (Person)).Indexed(false);
Dim configuration As IEmbeddedConfiguration = Db4oEmbedded.NewConfiguration() configuration.Common.ObjectClass(GetType(Person)).Indexed(False)