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Tuning
Use this information to improveHCL 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 theInclude 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.
- 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.
  - Managing the memory cache on the Web server
    Mapping information about databases and authenticating users can take time. To optimize response time, Domino® uses a memory cache (command cache) to store this information. The memory cache stores the information for quick access.
  - Specifying network time-outs on the Web server
    Open, inactive sessions can prevent users from accessing the server. Specify time limits for activities between the Domino® Web server and clients or CGI programs so connections do not remain open if there is no network activity between them.
  - Running Web agents
    You can specify whether Web application agents -- that is, agents triggered by browser clients -- can run at the same time. These include application agents invoked by the WebQueryOpen and WebQuerySave form events, and for agents invoked by the URL commandOpenAgent.
  - Specifying the number of threads used by the Web server
    An HTTP request is processed by a thread. A thread, in turn, can handle a number of network connections. You can specify the number of threads the Web server can process. In general, the number of threads specified is an indication of the number of users who can access the server simultaneously.
  - Improving file-download performance for Web clients
    Web clients can download a file that is attached to a page or that is in a server directory that is mapped by a URL. If a client is using a product that supports byte-range serving (available in HTTP 1.1 and higher) the client downloads the file in sections -- ranges of bytes -- and tracks the progress of each file download. If an interruption occurs, the client can resume the download from the point where it was interrupted. Without byte-range serving, users must repeat interrupted downloads from the beginning.
  - Improving performance for upload of file attachments
    If large file attachments are uploaded to the Web server, out of memory conditions can result, which prevent the transaction from completing. In the worst case, low memory conditions for the HTTP task can lead to HTTP task crashes for those functions of the Domino® server that do not handle low memory conditions.
- 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.

Improving Web server performance

After you set up theDomino® Webserver and make sure that it runs properly, check the server's performanceand response time.

To improve server performance and response time, you can do anyof the following:

Manage the memory cache on the Web server.
Specify network timeouts on the Web server.
Specify the number of threads used by the Web server.
Improve file-download performance for Web clients.
Specify whether more than one Web application agent can run atone time, as well as the timeout period for all Web application agents.
Restrict the amount of data that users can send to the serverusing the HTTP POST command.
Set up theDomino® Webserver in a cluster.

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