我正在尝试使用Cloudwatch获得FreeStorageSpace的RDS百分比（例如20％的免费或40％的免费），但是Cloudwatch指标仅提供FreeStorageSpace的字节数。
是否可以通过AWS Cloudwatch指标按百分比FreeStorageSpace进行出价？
我找到了AWS Cloudwatch提供的以下指标列表，但找不到我需要的指标。它还不提供总存储空间：
"BinLogDiskUsage"
"BurstBalance"
"CPUCreditBalance"
"CPUCreditUsage"
"CPUSurplusCreditBalance"
"CPUSurplusCreditsCharged"
"CPUUtilization"
"DBLoad"
"DBLoadCPU"
"DBLoadNonCPU"
"DatabaseConnections"
"DiskQueueDepth"
"FreeStorageSpace"
"FreeableMemory"
"MaximumUsedTransactionIDs"
"NetworkReceiveThroughput"
"NetworkTransmitThroughput"
"OldestReplicationSlotLag"
"ReadIOPS"
"ReadLatency"
"ReadThroughput"
"ReplicaLag"
"ReplicationSlotDiskUsage"
"SwapUsage"
"TransactionLogsDiskUsage"
"TransactionLogsGeneration"
"WriteIOPS"
"WriteLatency"
"WriteThroughput"
注意：
我正在使用Telegraf的cloudwatch插件在Influxdb中获取cloudwatch指标。