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POWMI causing memory leak(when run in multiple threads)
 

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    <p>My question is similar to <a href="https://stackoverflow.com/questions/5934639/periodical-wmi-query-causes-memory-leak">Periodical WMI Query Causes Memory Leak?</a> but with threads.</p> <p>I am writing a simple application to monitor process and memory information from a number of servers. However there is a memory leak. I have whittled down the problem to the following simple Console application.</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Management; using System.Threading; namespace ConsoleApplication1 { class Program { public static void dummyQuery(string ip, string query) { ConnectionOptions connOptions = new ConnectionOptions(); ManagementScope mgtScope = new ManagementScope(@"\\" + ip + @"\ROOT\CIMV2", connOptions); mgtScope.Connect(); ObjectQuery queryo = new ObjectQuery(query); using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(mgtScope, queryo)) { using (ManagementObjectCollection moc = searcher.Get()) { } } } static void Main(string[] args) { Console.ReadKey(); int times = 10000; for (int i = 0; i &lt; times; i++) { Thread t = new Thread(o =&gt; dummyQuery("xxxxxxxxx", @"SELECT WorkingSetSize FROM Win32_Process WHERE name='W3WP.exe'")); //t.IsBackground = true; t.Start(); System.Threading.Thread.Sleep(50); } Console.ReadKey(); //GC.Collect(); Console.ReadKey(); } } } </code></pre> <p>Is there a way to run WMI queries from threads safely?</p> <p>This is extracted from a much more complicated wpf application that checks the status of many servers much like the dummyQuery method. That application leaks memory at a disturbingly fast rate related to WMI calls. This sample looks like it is not leaking memory (Jim Mischel had a better way of checking this). I will install a profiler and take another look at the original app.</p>
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    1. COWhy are you calling GC.Collect(); manually?
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    2. CODid you verify that there is a memory leak with memory profiler ?
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    3. COalso have you tried using http://msdn.microsoft.com/en-us/library/system.management.wqlobjectquery.aspx
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