Memory 性能计数器 C#

Question

我在 C# 中遇到了 PerformanceCounter 的问题。当我在远程机器上运行它时它运行良好，但是当我试图在它运行的机器上运行它时我得到以下错误： System.InvalidOperationException：'Could not locate Performance具有指定类别名称“内存”、计数器名称“% Committed Bytes In Use”的计数器。

            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 性能计数器工作正常。

Answer 1

可能是几个问题

1. 您无需指定 MachineName 即可在本地实例上运行，这用于连接到只读远程实例。
2. 计数器名称可以在您的本地计算机上本地化

检查您的机器上的计数器是否可用

1. Go 到资源管理器中的“控制面板\所有控制面板项\管理工具”
2. 打开性能监视器
3. 在 Monitoring Tools -> Performance Monitor 面板上，点击 + 按钮添加一个新的计数器
4. 从列表中单击 select Memory 并查看可用计数器。

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 catNameList.Contains() 调用以检查计数器是否可用。

找到您可以使用的所有计数器

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;
}