Chapter 2: Capacity and Availability Management 21

and “Edit Registry Information” Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running the Microsoft Windows NT® or Microsoft Windows® 2000 operating system, you should also update your emergency repair disk (ERD).

No Performance Optimizer

The Performance Optimizer (also known as PerfWiz) is an Exchange 5.5 tool that enables you to specify how an Exchange 5.5 computer is to be configured—for example as a private store or a public store server. In addition, you can limit an Exchange 5.5 server’s memory usage and specify how many users it would be expected to handle. Based on your choices, files written by the various Exchange components (information store, message transfer agent [MTA], and so forth) can be assigned to specific fixed disks, depending upon available storage.

Exchange 2000 does not use a tool like Performance Optimizer. One reason for this is that the new release of Exchange is better capable of performing certain tasks as they are required, such as dynamically changing certain parameters, spinning up more threads, and so on. To go beyond these dynamic changes, the administrator must manually optimize disk utilization and manually modify registry keys, but fewer such registry changes are necessary.

Optimizable Features

Features in Exchange 2000 that can be optimized include:

Disks

Message transfer agent (MTA)

Simple Mail Transfer Protocol (SMTP)

Information-store database

Extensible storage engine (ESE) cache and log buffers

Active Directory connector

Active Directory integration

Installable file system (IFS) handle cache, credentials cache, and mailbox cache, DSAccess cache and DSProxy

Post Office Protocol v3 (POP3) and Internet Mail Access Protocol (IMAP) settings

Outlook Web Access (OWA)

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Microsoft 1 manual No Performance Optimizer, Optimizable Features