利用windows性能计数器进行服务器性能监控示例分享

using system;
using system.collections.generic;
using system.text;
using system.diagnostics;
using system.threading;
using system.management;
using system.runtime.interopservices;
using system.data;
using system.data.sqlclient;
using system.directoryservices;
using system.collections;
using system.configuration;
using system.collections.specialized;
using system.io;

namespace mon.client
{
    public static class sysinfo
    {
        static dictionary<string, performancecounter> dic;
        static double diskusepercent;
        static double sysdiskusepercent;
        static sysinfo()
        {
            try
            {
                dic = new dictionary<string, performancecounter>();
                foreach (string setting in configurationmanager.appsettings)
                {
                    var arr = configurationmanager.appsettings[setting].split('#');
                    if (arr[arr.length - 1] == "iscounter")
                    {
                        try
                        {
                            var pc = new performancecounter(arr[0], arr[1], arr[2]);
                            dic.add(setting, pc);
                        }
                        catch (exception ex)
                        {
                            console.writeline(arr[0] + "找不到");
                            log.writelog(ex.message);
                        }
                    }
                }
            }
            catch (exception ex)
            {
                console.writeline(ex.message);
                log.writelog(ex.message);
            }
        }
        static void initdiskinfo()
        {
            #region 备忘
            //只获取系统盘代码如下
            //managementobject cpaninfo = new managementobject(string.format("win32_logicaldisk.deviceid=\"{0}\"", system.environment.systemdirectory.substring(0, 2)));
            //cpaninfo.get();
            //var s = convert.todouble(cpaninfo["size"]);
            //var l = convert.todouble(cpaninfo["freespace"]);
            //var d = (s - l) / s * 100;
            //return d;
            #endregion
            try
            {
                driveinfo[] drives = driveinfo.getdrives();
                long totalsize = 0;
                long freesize = 0;
                long ctotalsize = 0;
                long cfreesize = 0;
                foreach (driveinfo drive in drives)
                {
                    if (drive.drivetype == drivetype.cdrom)
                    {
                        continue;
                    }
                    totalsize += drive.totalsize;
                    freesize += drive.totalfreespace;
                    if (drive.name.startswith(system.environment.systemdirectory.substring(0, 2)))
                    {
                        ctotalsize += drive.totalsize;
                        cfreesize += drive.totalfreespace;
                    }
                }
                sysdiskusepercent = (ctotalsize - cfreesize) / (double)ctotalsize * 100;
                diskusepercent = (totalsize - freesize) / (double)totalsize * 100;
            }
            catch (exception ex)
            {
                console.writeline(ex.message);
                log.writelog(ex.message);
            }
        }
        public static void init()
        {
            //如有取数之前进行的业务可放在这里，提高性能
            initdiskinfo();
        }
        public static double getsysinfo(string infokey)
        {
            try
            {
                if (dic.containskey(infokey))
                {
                    return dic[infokey].nextvalue();
                }
                else
                {
                    if (infokey == "sysdiskusepercent")
                    {
                        return sysdiskusepercent;
                    }
                    else if (infokey == "diskusepercent")
                    {
                        return diskusepercent;
                    }
                    else
                    {
                        return -1;
                    }
                }
            }
            catch (exception ex)
            {
                console.writeline(ex.message);
                log.writelog(ex.message);
                return -1;
            }
        }
    }
}