无法获取数据以从AWS Cloudwatch指标返回

Question

我正在尝试使用cloudwatch代理监视内存指标，我目前有指标报告给AWS仪表板，但是当我尝试从api获取该信息时，什么也没有返回。请求成功，但值始终为0，在仪表板上我得到了真实数据。

        string AccessID = "accessId";
        string AccessSecret = "accessSecretId";
        AmazonCloudWatchClient cloudWatchUsage = new AmazonCloudWatchClient(AccessID, AccessSecret, RegionEndpoint.USEast2);
        Dimension dimension = new Dimension()
        {
            Name = "InstanceId",
            Value = "i-Id"
        };
        var dimensionList = new List<Dimension>();
        dimensionList.Add(dimension);

        Metric metrics = new Metric();
        metrics.Dimensions = dimensionList;
        metrics.Namespace = "CWAgent";
        metrics.MetricName = "Memory % Committed Bytes In Use";

        MetricStat metricStatMemoryAverage = new MetricStat();
        metricStatMemoryAverage.Metric = metrics;
        metricStatMemoryAverage.Period = 300;
        metricStatMemoryAverage.Stat = "Average";
        metricStatMemoryAverage.Unit = StandardUnit.Percent;

        MetricDataQuery metricMemoryDataQueryAverage = new MetricDataQuery();
        metricMemoryDataQueryAverage.Id = "memoryUsageAverage";
        metricMemoryDataQueryAverage.Label = "memoryUtilizationAverage";
        metricMemoryDataQueryAverage.MetricStat = metricStatMemoryAverage;

        var requestMemoryAverage = new GetMetricDataRequest
        {
            StartTimeUtc = testStart,
            EndTimeUtc = testEnd,
            MetricDataQueries = { metricMemoryDataQueryAverage }
        };

        var responceMemoryAverage = cloudWatchUsage.GetMetricData(requestMemoryAverage);


 {
"metrics": {
    "append_dimensions": {
         "InstanceId": "${aws:InstanceId}"
        },
    "metrics_collected":{
           "Memory":{
             "measurement":[
                "% Committed Bytes In Use"
             ],
             "metrics_collection_interval": 60
           },

        "Paging File": {
            "measurement": [
                "% Usage"
            ],
            "metrics_collection_interval": 60,
            "resources": [
                "*"
            ]
        }
    }
}

}