DOCUMENT:Q192065 22-DEC-1999 [exchange] TITLE :XADM: High CPU Usage by STORE Displaying a Folder View PRODUCT :Microsoft Exchange PROD/VER:winnt:5.0,5.5 OPER/SYS: KEYWORDS:exc55sp2fix exc5 exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 5.5, 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== The Microsoft Exchange Server information store (Store.exe) process may appear to hang and/or consume a high percentage of the systems processor utilization. Using Windows NT performance monitor to view the "% Processor Time" of all the threads being used by the Store.exe process will reveal one thread using the majority of the processor time. CAUSE ===== A categorized view is defined as a view set on a folder in which its contents are sorted or grouped by in some manner (for example, sorted by the From: field). This sorting or grouping can be in ascending or descending order. When a client sets this type of view on a folder, the information store creates a new table in the Exchange database that contains the data needed to display this view. In this case, when the information store built the Exchange database table, the contents were being sorted in a descending order. The Exchange database engine needs to detect a terminator to know it is has processed all the data, and in this case, the Exchange database engine was searching for the wrong terminator. Because this terminator did not exist, the same portion of the code was being executed repeatedly causing the information store process to utilize high percentages of the system processor and causing the appearance of a hung client for the user who was trying to enter this folder. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base: Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack STATUS ====== Microsoft has confirmed this to be a problem in Microsoft Exchange Server versions 5.0 and 5.5 A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next service pack that contains this fix. Contact Microsoft Technical Support for more information. Additional query words: hang stuck ====================================================================== Keywords : exc55sp2fix exc5 exc55 Technology : kbExchangeSearch kbExchange500 kbExchange550 kbZNotKeyword2 Version : winnt:5.0,5.5 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 1999.