How to Add the MsgHandleThreshold Registry Key Value

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This procedure outlines how to add the MsgHandleThreshold registry key value.

Before You Begin

Before you start managing your Exchange cluster, you may want to review what constitutes an Exchange Virtual Server and its associated Exchange resources. You may also want to become more familiar with Cluster Administrator—the primary tool used to configure and manage clusters.

Note

Before performing the cluster administration tasks outlined in this chapter, you must be familiar with the clustering concepts described in "Checklist: Preparation for installing a cluster" in the Microsoft Windows Server™ 2003 Enterprise Edition Online Help and in the Windows Server 2003 Technical Reference.

Also, make sure that you are familiar with "Using Server Clustering" in Planning an Exchange Server 2003 Messaging System and with "Deploying Exchange 2003 in a Cluster," in the Exchange Server 2003 Deployment Guide.

Warning

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.

Procedure

To add the MsgHandleThreshold registry key value

  1. Start Registry Editor.

  2. In the console tree, navigate to the following registry key:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\

    SMTPSVC

  3. In the console tree, right-click SMTPSVC, point to New, and then click Key.

  4. For the key name, type Queuing.

  5. Right-click Queuing, point to New, and then click DWORD Value.

  6. In the details pane, type MsgHandleThreshold for the registry key value.

  7. Right-click MsgHandleThreshold, and then click Modify.

  8. Under Base, click Decimal.

  9. Enter a value based on the following:

    • To configure your cluster for optimum failover performance, set the value to 1,000.

    • For optimum run-state performance, set the value to 10,000.