内存PerformanceCounter C#

Question

我在C#的PerformanceCounter考试上遇到了麻烦。当我在远程机器上运行它时，它运行得很好，但是当试图在运行它的机器上运行它时，我会得到以下错误：System.InvalidOperationException：‘无法找到具有指定类别名称'Memory’的性能计数器，计数器名称'% Committed在使用‘’。

            int i = 1;
            PerformanceCounter ramPerfCounter = new PerformanceCounter();
            ramPerfCounter.CategoryName = "Memory";
            ramPerfCounter.CounterName = "% Committed Bytes In Use";
            ramPerfCounter.MachineName = "server";
            ramPerfCounter.ReadOnly = true;

            PerformanceCounter cpuPerfCounter = new PerformanceCounter();
            cpuPerfCounter.CategoryName = "Processor";
            cpuPerfCounter.CounterName = "% Processor Time";
            cpuPerfCounter.InstanceName = "_Total";
            cpuPerfCounter.MachineName = "server";
            cpuPerfCounter.ReadOnly = true;

            do
            {

                float fMemory = ramPerfCounter.NextValue();
                float fCpu = cpuPerfCounter.NextValue();

                Console.WriteLine("CPU: " + fCpu.ToString());
                Console.WriteLine("RAM:" + fMemory.ToString());
                Thread.Sleep(1000);
            }
            while (i == 1);

CPU性能计数器工作得很好。

Answer 1

可能是几个问题

1. 您不需要指定运行在本地实例上的MachineName，它用于连接到只读远程实例。

检查您的计算机上是否有计数器可用

“监视工具”性能监视器面板上的资源管理器counter

• Click

2. Open Performance
3. 中的“控制面板\所有控制面板项\管理工具”，单击+按钮从列表中添加新的
4. 选择内存，并查看可用的计数器。

或者，您可以使用此代码获取类别列表。

public static List<string> GetCategoryNames(string machineName)
{
    List<string> catNameList = new List<string>();
    List<PerformanceCounterCategory> categories = new List<PerformanceCounterCategory>();
    try
    {
        if (!string.IsNullOrEmpty(machineName))
        {
            categories = PerformanceCounterCategory.GetCategories(machineName).ToList();
        }
        else
        {
            categories = PerformanceCounterCategory.GetCategories().ToList();
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
    }
    foreach(PerformanceCounterCategory category in categories)
    {
        catNameList.Add(category.CategoryName);
    }
    catNameList.Sort();
    return catNameList;
}

然后添加一个catNameList.Contains()调用，以检查计数器是否可用。

找到所有你可以使用的计数器

public static Dictionary<string, List<string>> GetPerfCounterNames(string machineName)
{
    Dictionary<string, List<string>> perfCounterList = new Dictionary<string, List<string>>();
    List<PerformanceCounterCategory> categories = new List<PerformanceCounterCategory>();
    try
    {
        if (!string.IsNullOrEmpty(machineName))
        {
            categories = PerformanceCounterCategory.GetCategories(machineName).ToList();
        }
        else
        {
            categories = PerformanceCounterCategory.GetCategories().ToList();
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
    }
    foreach (PerformanceCounterCategory category in categories)
    {
        List<PerformanceCounter> pcList = null;
        if (category.GetInstanceNames().Length > 0)
        {
            pcList = category.GetCounters(category.GetInstanceNames()[0]).ToList();
        }
        else
        {
            pcList = category.GetCounters().ToList();
        }
        List<string> pcNameList = new List<string>();
        foreach (PerformanceCounter pc in pcList)
        {
            pcNameList.Add(pc.CounterName);
        }
        pcNameList.Sort();
        perfCounterList.Add(category.CategoryName, pcNameList);
    }
    return perfCounterList;
}