DOCUMENT:Q228276 06-AUG-2002 [sms] TITLE :SMS: Foreground App Performance Degrades During SW Inventory PRODUCT :Microsoft Systems Management Server PROD/VER:winnt:2.0 OPER/SYS: KEYWORDS:kbsms200 kbsms200bug kbInventory ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Systems Management Server version 2.0 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base: Q256986 Description of the Microsoft Windows Registry SYMPTOMS ======== If an on-demand virus scanner is running when Systems Management Server software inventory (SINV) executes, performance of the foreground applications may degrade significantly for the duration of the inventory scan. To reduce the severity of the problem consider the following suggestions: - Carefully choose which files will be scanned on-the-fly by the on-demand virus scanner. Some types of files are less susceptible to virus infection than others, and it may be possible to scan those on a scheduled basis rather than on demand. - Carefully choose which types of files SINV will scan for inventory. The more overlap between the files scanned for inventory and the files scanned for viruses, the more work the virus scanner will have to do. - Review the scanning options for the virus scanner. It may allow for scanning on "run" separately from scanning on "open", and so on. It may also have options for fast scans versus full scans, or options for yield times. When considering changes to your virus scanning implementation, always follow the guidelines of your corporate virus/security policy and consult the vendor of your virus scanning software for advice. CAUSE ===== This occurs because as SINV opens each file to read its header information, the virus scanner scans it. Scanning a file for a virus signature is a processor-intensive operation. Because SINV may open several hundred files in a short period of time, the virus scanner may become CPU bound as it attempts to scan them all. STATUS ====== Microsoft has confirmed this to be a problem in Systems Management Server version 2.0. This problem has been corrected in the latest U.S. service pack for Systems Management Server version 2.0. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K MORE INFORMATION ================ WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To specify the sleep interval, create a DWORD value called "Reserved" in the following registry key on each client computer: HKLM\SOFTWARE\Microsoft\SMS\Client\Client Components\Software Inventory Agent\ Set this value to the desired time in milliseconds (ms). The default is 1 ms and the maximum is 500 ms. You may need to adjust this value for your specific environment. Start with a small value and work up until you get acceptable foreground application performance. Additional query words: prodsms mcafee vshield checker anti antivirus smsinv sw inv smsfaqtop ====================================================================== Keywords : kbsms200 kbsms200bug kbInventory Technology : kbSMSSearch kbSMS200 Version : winnt:2.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.