DOCUMENT:Q281493 11-JUN-2002 [exchange] TITLE :XADM: Information Store Does Not Start with ESE Event ID 188 PRODUCT :Microsoft Exchange PROD/VER::5.5 OPER/SYS: KEYWORDS:exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 ------------------------------------------------------------------------------- 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 ======== The information store may not start (even with an empty Mdbdata folder) and the following event ID may be logged: Event ID: 188 Event Type: Error Event Source: ESE97 Event Category: System Parameter Settings Description: MSExchangeIS (1956) System parameter stop clean flush threshold (1962) is less than start clean flush threshold (3270). CAUSE ===== This issue can occur if the Buffer Threshold Low Percent registry key is missing or has an incorrect value (too high). RESOLUTION ========== To resolve this issue, make sure that the Buffer Threshold Low Percent key exists and has a value that is equal to or less than the Buffer Threshold High Percent value. Exchange Performance Optimizer (Perfwiz) adds two registry keys: the Buffer Threshold Low Percent key and the Buffer Threshold High Percent key. Both keys may not exist; this does not cause any issues. However, if one of these keys exists, the other key must also exist. 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. These keys are located under the following key in the registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Service\MsExchangeIs\ParameterSystem The default setting for both keys is REG_DWORD: 0x3. Additional query words: ====================================================================== Keywords : exc55 Technology : kbExchangeSearch kbExchange550 kbZNotKeyword2 Version : :5.5 Issue type : kbprb ============================================================================= 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.