为什么我没有`_Total` 性能计数器实例？

Question

我正在使用以下注册码创建一个多实例性能计数器，但似乎没有_Total 实例——即使我有多个活动实例。我需要做什么才能得到总数？

注册码：

var slc = new CounterCreationDataCollection();
slc.Add(new CounterCreationData()
{
    CounterName = "Channels Open",
    CounterType = PerformanceCounterType.NumberOfItems32,
    CounterHelp = "Number of channels that have not been cleaned up."
});
PerformanceCounterCategory.Create("Frob", "Monitors the frob", 
    PerformanceCounterCategoryType.MultiInstance, slc);

报告代码：

var channelName = "Widget 6";
var pcOpen = new PerformanceCounter("Frob", "Channels Open", channelName, false);

// elsewhere
pcOpen.Increment();

// followed by
pcOpen.Decrement();

生产：

Answer 1

我相信_Total 计数器只是他们手动汇总总数的另一个实例。它具有领先的_ 的原因是它按字母顺序排列在<All instances> 中的< 之前，这是一个“元”计数器。

var pc5Name = "Widget 5";
var pc6Name = "Widget 6";
var pc5 = new PerformanceCounter("Frob", "Channels Open", pc5Name, false);
var pc6 = new PerformanceCounter("Frob", "Channels Open", pc6Name, false);
var pcTotal = new PerformanceCounter("Frob", "Channels Open", "_Total", false);

// elsewhere
pc5.Increment();
pcTotal.Increment()

// more elsewhere
pc6.Increment();
pcTotal.Increment()

// followed by
pc5.Decrement();
pcTotal.Decrement();