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我写过一些WMI代码,在大多数机器上运行得非常好。但是在某些机器上(几乎所有基于SSD的mac)都会导致巨大的性能问题。它导致WMIPrvSe进程继续击中I/O Other。如果您运行另一个应用程序来进行同样的观察,那么它会慢慢爬到软件无法使用的地步。WMI Event Watcher性能问题
System.Management.WqlEventQuery queryIn;
System.Management.WqlEventQuery queryOut;
System.Management.ManagementScope scope = new System.Management.ManagementScope("root\\CIMV2");
scope.Options.EnablePrivileges = true;
try
{
queryIn = new System.Management.WqlEventQuery();
queryIn.EventClassName = "__InstanceCreationEvent";
queryIn.WithinInterval = new TimeSpan(0, 0, 1);
//queryIn.GroupWithinInterval = new TimeSpan(0, 0, 0);
queryIn.Condition = @"TargetInstance ISA 'Win32_DiskDrive' AND TargetInstance.InterfaceType = 'USB'";
mUSBWatcherIn = new System.Management.ManagementEventWatcher(scope, queryIn);
//adds event handler that’s is fired when the insertion event occurs
mUSBWatcherIn.EventArrived += new System.Management.EventArrivedEventHandler(USBInserted);
queryOut = new System.Management.WqlEventQuery();
queryOut.EventClassName = "__InstanceDeletionEvent";
queryOut.WithinInterval = new TimeSpan(0, 0, 1);
//queryOut.GroupWithinInterval = new TimeSpan(0, 0, 0);
queryOut.Condition = @"TargetInstance ISA 'Win32_DiskDrive' AND TargetInstance.InterfaceType = 'USB'";
mUSBWatcherOut = new System.Management.ManagementEventWatcher(scope, queryOut);
//adds event handler that’s is fired when the insertion event occurs
mUSBWatcherOut.EventArrived += new System.Management.EventArrivedEventHandler(USBRemoved);
mUSBWatcherIn.Start();//run the watcher
mUSBWatcherOut.Start();
}
catch (Exception e)
{
System.Windows.Forms.MessageBox.Show(e.Message);
StopUSBWatcher();
}
有没有人有任何想法可以在这里发生什么?如果我删除此代码,那么它完美的作品。在其他机器上,它完美地工作。它非常奇怪。任何想法非常感谢!