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IBM® Domino 10.0.1 Documentation
Welcome to the IBM® Domino 10.0.1 Administrator Help.
Tuning
Use this information to improve IBM® Domino® server, Domino Web server, and messaging performance through the use of resource balancing and activity trends, Server.Load commands, advanced database properties, cluster statistics, and the Server Health Monitor.
Improving Domino® server performance
Read the following topics for help on improving basic Domino® server performance and capacity, as well as the performance of these features: Agent Manager, databases and the Domino directory, the directory catalog, LDAP searches, mail, Web server, and UNIX™ server.
Improving UNIX™ server performance
Methods of improving UNIX™ server performance include adjusting disk and memory requirements and disk i/o tuning, and employing console and database logging.

IBM® Domino 10.0.1 Documentation
Welcome to the IBM® Domino 10.0.1 Administrator Help.
- What's new in IBM® Domino® 10?
  Learn about all of the new features for administrators in IBM® Domino® 10.
- Overview
  Welcome to IBM® Domino® Administrator Help.
- Installing
  Use this documentation to install the IBM® Domino® server and subsequently deploy the IBM Notes® client.
- Planning
  Use this topic as an overview of planning task.
- Configuring
  Use this information to configure an IBM® Domino® network, users, servers (including Web servers), directory services, security, messaging, widgets and live text, and server clusters. Also use this information to set up IBM iNotes® on a server using Domino Off-Line Services (DOLS).
- Securing
  This section describes IBM® Domino® security features, including execution control lists, IDs, and SSL.
- Administering
  This documentation provides information about the administration tools for managing and monitoring IBM Domino® servers and databases.
- Tuning
  Use this information to improve IBM® Domino® server, Domino Web server, and messaging performance through the use of resource balancing and activity trends, Server.Load commands, advanced database properties, cluster statistics, and the Server Health Monitor.
  - Resource balancing and activity trends
    Domino® server resource utilization can be separated into two types, system activity and user activity. System activity, which includes the level of processor, disk, memory, and network consumption that Domino generates to keep the server running, is a fixed amount of activity, as long as systems are healthy and performing smoothly. Domino servers typically use a modest percentage of their resources to run. The remaining server capacity is used to support user activity, which varies with the usefulness of the data on the server.
  - The Server.Load tool
    Server.Load is a capacity-planning tool that you use to run tests, also called "scripts" and "workloads," against a targeted Domino® server to measure server capacity and response metrics.
  - Tuning Domain Indexer performance
    Each time the Domain Indexer task runs, it looks in the Domain Catalog for new databases that have the Include in multi database indexing property enabled. It then looks for documents and files in existing databases and file systems that are new or changed since the last time it ran, and adds them to the Domain Index.
  - Improving Domino® server performance
    Read the following topics for help on improving basic Domino® server performance and capacity, as well as the performance of these features: Agent Manager, databases and the Domino directory, the directory catalog, LDAP searches, mail, Web server, and UNIX™ server.
    - Tools for measuring server performance
      Domino® offers performance tools you can use to measure and evaluate server performance.
    - NOTES.INI settings that affect Domino® server performance
      The NOTES.INI settings listed in this topic affect Domino® server performance.
    - Database properties that affect system performance
      The following advanced database properties affect Domino® server performance.
    - Improving partitioned server performance and capacity
      You use the same set of tools to monitor partitioned servers as you use to monitor individual servers. However, remember that a partitioned server can use a large number of system resources, denying those resources to other partitioned servers on the same computer.
    - Improving Agent Manager performance
      The Agent Manager controls when agents run on a server. Every time an agent runs, it uses server resources. To control when scheduled and event-triggered agents run, you specify settings in the Server document and in the NOTES.INI file. Customizing when agents run may conserve server resources, but it may also delay when agents run.
    - Updating the design of an enabled agent
      Design update helps preserve agents in a database whose design is being updated.
    - Improving server performance using the configuration collector
      The Domino® configuration collector provides snapshots of how the Domino server is configured. You can use that configuration information to analyze recent changes made to the server's configuration that have impacted server performance.
    - Improving database and Domino® Directory performance
      By default, the Domino® Directory uses two database performance properties -- Document table bitmap optimization and Don't maintain unread marks -- to improve performance. The following NOTES.INI settings can affect database and Domino Directory performance.
    - Tips for tuning mail performance
      You can modify settings on the Configuration Settings document, or change NOTES.INI settings to help improve mail performance.
    - Improving Windows™ server performance
      In general, use the default settings for your Microsoft™ Windows™ server. However, there are some measures you can take which may result in performance improvements.
    - Improving UNIX™ server performance
      Methods of improving UNIX™ server performance include adjusting disk and memory requirements and disk i/o tuning, and employing console and database logging.
  - Improving Web server performance
    After you set up the Domino® Web server and make sure that it runs properly, check the server's performance and response time.
  - Improving mail performance
    Domino® includes features that improve efficiency in specific environments, but these features may not be switched on by default.
  - Setting advanced database properties
    Advanced database properties include performance optimization and compression features, as well as ways to manage usability features such as unread marks and soft deletions.
  - Understanding cluster statistics
    Three categories of Domino® cluster statistics help you analyze clusters
  - Improving the performance of the Server Health Monitor
    If the Domino® Administration client workstation performs at 100 percent CPU utilization for a long period of time, the Server Health Monitor discards server statistic data to keep up with the workload.
- Troubleshooting
  This section describes how to find and solve problems with IBM® Domino® server and Administrator client.
- Glossary

Improving UNIX™ server performance

Methods of improving UNIX™ server performance include adjusting disk and memory requirements and disk i/o tuning, and employing console and database logging.

Disk and memory requirements

When a UNIX™ system runs Domino® server software, the server must have enough disk space for program and data files and enough memory to handle swapping and the number of processes.

On Linux™ systems that are used for mail servers or applications where more than a few hundred databases are to be opened at one time, it is advisable to increase the file limit from its 1024 default value. You can modify this value by editing the file /etc/security/limits.conf. The entry should be for the nofile item.

		@notes		soft	nofile	60000

@notes		hard	nofile	80000

In this example, the limit is set for a group in which the user who is running Domino® is a member. The limit can also be set, if desired, to the user who is running Domino®. The soft and hard values in this example may vary to meet the needs of your system, as long as they are large enough to stay under the file limit.

Other memory and network tuning parameters on Linux™ that help Domino® run more efficiently are set by a program which automatically runs at the startup of the Domino® server.

Disk I/O tuning

Maintaining multiple file systems for operating system files, swap space, transaction logs, and data improves overall server performance.

Use RAID 0+1 hardware for the disk drives on which the data files reside. Use multiple smaller disk drives instead of a few large disk drives for Domino® data. Domino® does not perform simple predictable sequential reads; therefore, disable Read Ahead Cache and enable Write Cache.

Keeping swap space on its own separate striped volumes improves server performance at high loads. The transaction logs should always be on the most reliable and highest performing disk subsystem available to the system hosting the Domino® server. Transaction logging must be on its own disk drives for improved server restart time, reliability, and availability. The logged transactions are written to disk as fast serial writes to a sequential file that is of configurable size in 4K blocks.

Console and database logging

To improve server performance, limit the amount of information that is logged to the log file (LOG.NSF) and the console.