Operating Systems: i5/OS
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Getting performance data from request metrics
This topic describes how to enable request metrics.
Overview
Request metrics is a tool that enables you to track individual transactions,
recording the processing time in each of the major WebSphere Application Server
components. You can enable request metrics from the following locations:
- The administrative console. To enable request metrics in the administrative
console, refer to the instructions under the Steps for this task section that
follows.
- Command line. JMX interfaces are exposed
for enabling request metrics through external tools. For more details on the
exposed interfaces, refer to the request metrics API documentation.
To enable request metrics in the administrative console:
Procedure
- Open the administrative console.
- Click Monitoring and Tuning > Request metrics in
the console navigation tree.
- Verify that Prepare servers for request metrics
collection check box is selected. If Prepare servers for request metrics
collection check box is not selected, you will have to select it, save
the change, and restart the server.
- Select All, None, or Custom under Components
to be instrumented to specify the request metrics components. If you select Custom,
be sure to select the components you would like to enable.
- Specify the components that are instrumented by request metrics.
- Specify
how much data to collect.
- Enable
and disable logging.
- Enable Application Response Measurement (ARM) Agent.
- Specify which ARM type to use.
- Specify the name of the ARM transaction factory implementation
class.
- Isolate
performance for specific types of requests.
- Add
and remove request metrics filters.
- Click Apply or OK.
- Click Save.
Results
The request metrics is enabled.
What to do next
To ensure that the Web server plug-in recognizes the changes you
made for the request metrics configuration, follow the steps in Regenerating the Web server plug-in configuration file, if
logging time spent in the Web server.
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Request metrics
Application Response Measurement
Isolating performance for specific types of requests
Specifying how much data to collect
Regenerating the Web server plug-in configuration file
Enabling and disabling logging
Preparing a server to use ARM
Related tasks
Monitoring application flow
Why use request metrics?
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