Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual Domino Web Access, Domino Subsystem Tuning

11.8 Domino Web Access

The following recommendations help optimize your Domino Web Access environment:

1.Refer to the redbooks listed at the beginning of this chapter. The redbook, “iNotes Web Access on the IBM eServer iSeries server,” contains performance information on Domino Web Access including the impact of running with SSL.

2.Use the default number of 40 HTTP threads. However, if you find that the Domino.Threads.Active.Peak is equal to Domino.Threads.Total, HTTP requests may be waiting or the HTTP server to make an active thread idle before handling the request. If this is the case for your environment, increase the number of active threads until Domino.Threads.Active.Peak is less than Domino.Threads.Total. Remember that if the number of threads is set very large, CPU utilization will increase. Therefore, the number of threads should not exceed the peak by very much.

3.Enable Run Web Agents Concurrently on the Internet Protocols HTTP tab in the Server Document.

4.For optimal messaging throughput, enable two MAIL.BOX files. Keep in mind that MAIL.BOX files grow as a messages queue and this can potentially impact disk I/O operations. Therefore, we recommend that you monitor MAIL.BOX statistics such as Mail.Waiting and Mail.Maximum.Deliver.Time. If either or both statistics increase over time, you should increase the number of active MAIL.BOX files and continue to monitor the statistics.

11.9Domino Subsystem Tuning

The objects needed for making subsystem changes to Domino are located in library QUSRNOTES and have the same name as the subsystem that the Domino servers run in. The objects you can change are:

yClass (timeslice, priority, etc.)

ySubsystem description (pool configuration)

yJob queue (max active)

yJob description

The system supplied defaults for these objects should enable Domino to run with optimal performance. However, if you want to ensure a specific server has better response time than another server, you could configure that server in its own partition and change the priority for that subsystem (change the class), and could also run that server in its own private pool (change the subsystem description).

You can create a class for each task in a Domino server. You would do this if, for example, you wanted mail serving (SERVER task) to run at a higher priority than mail routing (ROUTER task). To enable this level of priority setting, you need to do the following:

1.Create the classes that you want your Domino tasks to use.

2.Modify the following IFS file ‘/QIBM/USERDATA/LOTUS/NOTES/DOMINO_CLASSES’. In that file, you can associate a class with a task within a given server.

3.Refer to the release notes in READAS4.NSF for details.

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
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