Microsoft 1 - page 33

Chapter 2: Capacity and Availability Management 25

your server becomes low on kernel memory, your system becomes unresponsive. T o regain

control of your server, you must restart it to free up the kernel memory.

Table 2.1 shows the registry parameters you might need to alter if you are to make perfor-

mance gains on servers with more than 1 GB RAM.

Table 2.1 Registry Parameters to Alter for Large Servers

Location Parameter Default When to Recommended

Setting Change Setting

HKEY_LOCAL MsgHandle Not present, To gain Enough to

_MACHINE\System Threshold but defaults additional accomodate

\CurrentControlSet (REG_DWORD) to 0x3e8 performance the total

\Services\SMTPSVC when message number of

\Queuing queues are messages in

consistently the queues at

greater than any one time.

1,000 You should not

raise the value

to greater than

15,000

decimal

HKEY_LOCAL MsgHandle Not present, To gain Set to the

_MACHINE\System AsyncThreshold but defaults additional same

\CurrentControlSet (REG_DWORD) to 0x3e8 performance value as

\Services\SMTPSVC when message “MsgHandle

\Queuing queues are Threshold”

consistently

greater than

1,000

HKEY_LOCAL FileCache Not present, If the 0x258 (600)

_MACHINE\System MaxHandles but defaults “MsgHandle

\CurrentControlSet (REG_DWORD) to 0x320 Threshold”

\Services\Inetinfo registry

]Parameters parameter

value is

increased

from defaults

MaxMessageObjects is a registry parameter that correlates to the number of messages

that can be queued up at a given time by SMTP. Each e-mail message resident in the SMTP

queue uses at least 4 KB of memory; therefore, it is possible to run into a low memory

situation with a very large queue. Setting MaxMessageObjects lower reduces the maxi-

mum number of messages that can reside in the queue, thus decreasing the maximum

memory footprint for SMTP. After this limit is reached, each SMTP connection made to

the server will return with an out-of-memory error. For example, if MaxMessageObjects is

Contents

Main ii Contents Chapter 1 Introduction 1 Chapter 2 Capacity and Availability Management 11 Change and Configuration Management 37 Chapter 4 Enterprise Monitoring 53 Chapter 5 Protection 71 Chapter 6 Glossary 97 Support 89 Page Page Page Introduction Microsoft Operations Framework (MOF) Page How to Use This Guide Efficiency, Continuity, and Security Figure 1.2 Efficiency Continuity Security Chapter Outlines Planning and Deployment Service Level Agreements Features Performance Recovery Support Related Topics Page Capacity and Availability Management Capacity Management Page Page Availability Management Service Hours Service Availability Minimizing System Failures Decreasing Single Points of Failure Increasing the Reliability of Exchange 2000 Minimizing System Recovery Time Performance Tuning Making Changes to the Registry No Performance Optimizer Optimizable Features Tuning Considerations Upgrading from Exchange 5.5 to Exchange 2000 Tuning the Message Transfer Agent (MTA) Tuning SMTP Transport Mailroot Directory Location SMTP File Handles Page Store and ESE Tuning Online Store Maintenance Online Backups Choosing the Correct Maintenance Strategy Extensible Storage Engine (ESE) Heaps Store-Database Cache Size Page Log Buffers Tuning Active Directory Integration Page Tuning Outlook Web Access (OWA) Page Hardware Upgrades Page Change and Configuration Management Prerequisites Change Management Defining Change Type Step 1 Request for Change Is Submitted to Change Manager Step 2 Change Manager Assesses the RFC Step 3 Change Is Passed to IT Executive Committee for Approval Step 4 Change Is Passed to the Change Advisory Board for Scheduling Step 5 Change Is Passed to the Change Owner Step 6 Change Process Evaluation Minor and Standard Changes Scripting Minor and Standard Changes Security Software Control and Distribution Documentation Configuration Management Tools for Configuration Management Configuration Management and Change Management Configuration Items Page Page Page Defining Configuration Items Configuration Management and Exchange Maintaining the Configuration Management Database Change Management Ownership Security Backup Exchange System Policies Administering System Policies Page Enterprise Monitoring Prerequisites Performance Monitoring System Monitor Exchange 2000 Objects and Counters to Monitor Service or Resource Performance Object Information Store Counters SMTP Server MSExchangeMTA and MSExchangeMTAConnections MSExchangeIM Virtual Servers MSExchangeAL Windows 2000 Objects and Counters to Monitor Table 4.2 Subjects and Associated Objects and Counters Subsystem Object Counter Exchange Comments Subsystem Object Counter Exchange Comments Centralized Monitoring Event Monitoring Event Viewer Log Files Centralized Event Monitoring Availability Monitoring Monitoring and Status Tool Adding Services to the Default Configuration Monitoring Resources Notifications Status Disabling Server Monitoring Centralized Availability Monitoring Client Monitoring Page Page Protection Chapter Start Point Chapter End Point Protection Against Hacking Firewall Operations Maintaining Firewall Availability Ensuring That Only the Correct Traffic Passes Through the Firewall Monitoring Against Hacker Intrusion Dealing With Security Breaches Anti-Virus Measures Staying Current Dealing With Virus Infection Blocking Attachments at the Client Page Disaster Recovery Procedures Backing Up Page Offline Backup Disk Imaging Restoring Recovering Individual Messages Recovering Lost Mailboxes Recovering Exchange Stores and Storage Groups Full Exchange Server Recovery Recovering Exchange After Active Directory Failure Alternate Server Recovery Recovery Testing Page Page Support Providing Support for End Users Reducing End User Support Costs Page Problem Reporting Dealing with User Problems Notifying Users Exchange Problem Management Page Page Glossary