Softlayer API内存使用情况(Softlayer API memory usage)

 我正在使用getMemoryMetricDataByDate分析Softlayer虚拟客户端上过去三个月的内存使用情况。 示例guest虚拟机上的规范是maxCpu = 2，maxMemory = 8192 MB。 
 
 据报道，内存使用率为maxMemory的89％到100％。 对于此服务器，这似乎不正确。 一个示例数据点是： 
 
[counter] => 8127187622.8697
[dateTime] => 2016-05-04T18:00:00-06:00
[type] => memory_usage
 
 在183个数据点的集合中，最小计数器值为7652222531.7333（字节），最大值为8589934592（字节）。 
 
 为了交叉检查，我使用getMemoryMetricImageByDate将图形图像拉到相同的日期范围。 见下文。 该图表显示两行。 第一个内存平均值为1.6 GB，最大值为11.1 GB。 第二行显示内存平均值为5.3 GB，最大值为220.1 GB。 
 
 我的问题是： 
 
 为什么图表上有两行？ 
 
 为什么getMemoryMetricDataByDate和getMemoryMetricImageByDate之间的数据显着不同，因为为每个调用指定了完全相同的虚拟客户和日期范围？ 

I am analyzing memory usage for the past three months on a Softlayer Virtual Guests using getMemoryMetricDataByDate. Specs on an example guest are maxCpu = 2, and maxMemory = 8192 MB. 
 
Memory usage is reported to be at 89% to 100% of maxMemory. This does not seem correct for this server. An example datapoint is:
 
[counter] => 8127187622.8697
[dateTime] => 2016-05-04T18:00:00-06:00
[type] => memory_usage
 
In the set of 183 datapoints, the min counter value is 7652222531.7333 (bytes) the max is 8589934592 (bytes).
 
To cross check, I pulled the graphic image for the same date range using getMemoryMetricImageByDate. See below. The chart shows two lines. The first with memory average of 1.6 GB and max of 11.1 GB. The second line shows memory average of 5.3 GB and max of 220.1 GB. 
 
My questions are:
 
Why are there two lines on the chart?
 
Why is the data significantly different between getMemoryMetricDataByDate and getMemoryMetricImageByDate, given that the exact same virtual guest and date range were specified for each call?

原文：https://stackoverflow.com/questions/38776711