CloudWatch Application Insights 支持以下指标：
ReplicationLatency
BytesPendingReplication
OperationsPendingReplication
4xxErrors
5xxErrors
AllRequests
GetRequests
PutRequests
DeleteRequests
HeadRequests
PostRequests
SelectRequests
ListRequests
SelectScannedBytes
SelectReturnedBytes
FirstByteLatency
TotalRequestLatency
BytesDownloaded
BytesUploaded
