Windows Services CPU Uses

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Hi i work on a windows service to fetch data from database once in a day on a particulate time, and i work with both "using System.Timers" and "using System.Threading;".

when i use threads the whole process is going safe n cpu uses is 0% in ideal conditions n when the service is in running condition it takes 2 or 3% of cpu.

but when i use the same app with using System.Timers the cpu uses goes more then 50%.

i cant understand way this happens.

my code:-
using timer

C#

System.Timers.Timer timer = new System.Timers.Timer();
public Service1()
{
      InitializeComponent();
}
protected override void OnStart(string[] args)
{
   timer.Elapsed += new ElapsedEventHandler(DoWork);
   timer.Interval = 30000;
   timer.Enabled = true;
   timer.Start();
   System.Diagnostics.Process.GetCurrentProcess().MinWorkingSet = System.Diagnostics.Process.GetCurrentProcess().MinWorkingSet;
}
 
protected void DoWork(object sender, ElapsedEventArgs e)
            {
                  while (true)
                  {
                        DateTime timeNow = DateTime.Now;
                        if ((timeNow.Hour == 12 && timeNow.Minute == 0))
                        {
                              timer.Enabled = false;
                              timer.Stop();
                              fetchdata.fetchdata();
                        }
                  }
            }
 
protected override void OnStop()
            {
                  timer.Enabled = false;
                  timer.Stop();
            }

Posted 28-Nov-11 20:10pm

anurag.netdeveloper

Updated 28-Nov-11 20:22pm

v4

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[no name] 29-Nov-11 2:13am

EDIT: Added "pre" and "code" tag

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DaveAuld · Accepted Answer · 2011-11-28T20:33:00

Your while (true) will be running in a loop constantly until the time is 12:00, one dirty method could be to check how far you are away from the trigger time and go to sleep for 5 minutes or something. Although it would not be a recommended solution.

One other solution would be to write your app to perform the task and only the task, and then use the Windows inbuilt Task Scheduler to attach the application to and let windows take care of the timing/trigger.

Have you read this article;
A New Task Scheduler Class Library for .NET[^]