performance
The AWS KMS key identifier for encryption of Performance Insights data. The KMS key identifier is the key ARN, key ID, alias ARN, or alias name for the KMS key. If you do not specify a value for `PerformanceInsightsKMSKeyId`, then Amazon RDS uses your default KMS key. There is a default KMS key for your AWS account. Your AWS account has a different default KMS key for each AWS Region. For information about enabling Performance Insights, see EnablePerformanceInsights.