Custom settings
The Tivoli Performance Viewer allows you to set instrumentation levels using a graphical view of the modules and submodules. As you select individual application elements and set the level, a list of the counters associated with that level is displayed. The Administrative Console offers instrumentation level access only on the top-level modules.
Changing or setting the instrumentation level always starts the performance data reporting immediately for the selected resource category.
The counters available for the selected resource category will be shown on the lower right (in the Counters box) when you choose the monitoring level. Figure 16-13 shows the counters available for Transaction Manager with the instrumentation level set to Low.
Figure 16-13 Performance Monitoring Settings for Transaction Manager
Setting a particular instrumentation level for one resource category applies the same instrumentation level to all of its subcategories. You can specify a different level for an individual resource subcategory by selecting it and specifying the desired level.
Expand the resource categories to make sure that only the desired level is applied; otherwise the performance impact may be higher than you expected.
Important: Instrumentation level settings are permanent even after restarting the appserver or Node Agent. You have to disable them explicitly. |
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