XADM: Slow Intra-Site Replication on Multi-Processor Server

In a multi-server site, intra-site replication may be slow on a multi-processor server. This may occur when a multi-processor server needs to replicate many changes out to other servers in the site, for example, after many mailboxes have been modified or added. A multi-processor server may be slower compared to a single-processor server performing the same task. Replication between different sites is not affected.

The behavior described can be observed when you monitor the following counter in the Windows NT Server Performance Monitor: The value of this counter may be higher on a single-processor server compared to a multi-processor server. At the same time, the processor time used by the Microsoft Exchange Server directory service is high.

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: The English version of this fix should have the following file attributes or later:

Component: Information Store


Component: Directory

Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.