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A user is consuming their maximum allowed share of server resources

 

Topic Last Modified: 2008-04-21

The Microsoft Exchange Server 2007 Management Pack for Operations Manager monitors the Windows Application log on computers that are running Exchange Server 2007 and generates this alert when the event or events specified in the following Details table are logged.

To learn more about this alert, if you are using Microsoft Operations Manager 2005, do one or more of the following:

  • From the Operator Console, select this alert, and then click the Properties tab. Review the description of the alert that includes the variables specific to your environment.

  • From the Operator Console, click the Events tab, and then double-click the event in the list for which you want to review the event description. Review the events that have been logged that meet the criteria of this Operations Manager alert.

To learn more about this alert, if you are using System Center Operations Manager 2007, do one or more of the following:

  • From the Operations Console, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.

  • From the Operations Console, double-click this alert, and then click the Alert Context tab. Review the events that have been logged that meet the criteria of this Operations Manager alert.

 

Product Name

Exchange

Product Version

8.0 (Exchange Server 2007)

Event ID

9646

Event Source

MSExchangeIS*

Alert Type

Warning

MOM Rule Path

Microsoft Exchange Server/Exchange 2007/Mailbox/Information Store

MOM Rule Name

A user is consuming their maximum allowed share of server resources. For details check event logs with Event ID 9646.

This Error event indicates that a MAPI session tried to open more than the maximum number of objects allowed for the object type specified in the event description. MAPI is a protocol that is used by Microsoft Exchange clients such as Microsoft Office Outlook to connect to the server that is running Exchange Server. By default, each object type, such as Folder, Message, and Attachment, has been assigned a limit per MAPI session. This event occurs when this limit is exceeded by a MAPI session. The MAPI session that caused this event is specified in the event description.

To resolve this error, follow these steps:

  1. Investigate any third-party applications or add-ins that are running on the computer of the user specified in the event description of event MSExchangeIS 9646. If the third-party application or add-in is opening too many objects or is leaving too many objects open on the server, other clients may not be able to log on to the server. For more information, see Microsoft Knowledge Base article 830829, Your Exchange Server 2003 computer may stop responding after a MAPI client opens more than the default value of certain server objects.

  2. Investigate the functionality of any batch file or scripts that you may be using to send messages. If the batch file or script is not correctly closing MAPI sessions, other clients may not be able to log on to the server. For more information, see Microsoft Knowledge Base article 830836, Event ID 9646 is logged when you try to send many messages in Exchange Server 2003.

  3. Monitor the MAPI session specified in the event description to exclude any unusual activity associated with this MAPI session.

  4. Increase the default maximum limit for the object type specified in the event description by editing the registry. To do this, follow these steps:

    Important   Use caution before you adjust the maximum number of objects that are allowed per MAPI session. When you increase the maximum number of an object type, you also increase the memory that may be consumed by MAPI requests. Incorrectly configuring this value could lead to out-of-memory warnings or virtual memory fragmentation warnings. Increasing this value can also prevent any e-mail clients from logging on to the server.

    Caution   Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.

    1. Click Start, click Run, type regedit, and then click OK.

    2. Expand the following registry sub key:  \\HKEY_LOCAL_MACHINE SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem

    3. Right-click ParametersSystem, point to New, and then click Key.

    4. Type MaxObjsPerMapiSession, and then press Enter to name the new sub key.

    5. Right-click MaxObjsPerMapiSession, click New, and then click DWORD Value.

    6. Enter the object type as specified in the event description and then press Enter.

    7. Right-click object type you entered, and then click Modify.

    8. In the Value data box, type the number of objects to which you want to limit this entry, and then click OK.

The following list provides default values for each object type in Exchange Server 2007:

 

Object type Value

objtMessage

250

objtFolder

500

objtAttachment

500

objtFolderView

500

objtMessageView

500

objtAttachView

500

objtStream

250

objtACLView

50

objtRulesView

50

objtFXSrcStrm

50

objtFXDstStrm

50

objtCStream

50

objtNotify

500,000

To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Search the Support Knowledge Base (KB) Web site.

To review Exchange 2007 event message articles that may not be represented by Exchange 2007 MOM alerts, see the Events and Errors Message Center.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

 
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