KB189942 - System Eventually Slows Down When MMC Left Open

Article ID: 189942

Article Last Modified on 6/23/2005

Microsoft Internet Information Server 4.0

This article was previously published under Q189942

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx

SYMPTOMS

Over time, the Windows NT system's responsiveness appears sluggish, and clients may report a gradual decrease in system performance. You may also notice that the Internet Information Server (IIS) is sluggish or not responding to clients.

CAUSE

The Microsoft Management Console (MMC) is leaking memory.

RESOLUTION

To resolve this problem, quit the Microsoft Management Console.

STATUS

Microsoft has confirmed this to be a problem in Internet Information Server version 4.0.

MORE INFORMATION

By tracking the amount of private bytes for Mmc.exe, you can observe that, over time, the amount increases without decreasing. View this with the Windows NT Performance Monitor by selecting the following counter to monitor:

   Object: Process
   Instance: MMC
   Counter: Private Bytes

Additional query words: MTS Snap-in handles

Keywords: kbbug kbpending KB189942