Performance monitoring using the WebSphere Commerce PMI module

You can monitor the performance of your WebSphere Commerce system by using the WAS Performance Monitoring Infrastructure (PMI). When users administer WebSphere Commerce, they can not only monitor the system based on the infrastructure provided by WAS but can also leverage additional counters provided by WebSphere Commerce to monitor URLs and task commands.

The WebSphere Commerce application server gathers statistics for URLs, tasks, and views. Each data key has an associated set of counters that provide information about such things as average response time of a task, maximum and minimum response times, the total number of times a task was called, and so on.

To set up the WAS PMI, see the Monitoring topic in the WAS Information Center.

After you have started the Tivoli Performance Viewer, from the Resource Selection panel, expand Commerce Counter Group. The data will be grouped according to Tasks, URLs, and Views under the Store ID. Note that all the task commands are found only under StoreId=0. Once a particular URL, View or Task command is selected from the Resource Selection Panel, the Counter Selection Panel will display the WebSphere Commerce counter. See Monitoring performance with Tivoli Performance Viewer (TPV) .

If you do not see WebSphere Commerce counter in the Tivoli Performance Viewer, enable the PMI for Commerce Counter Group. View the PMI page, click on...

Monitoring and Tuning | Performance Monitoring Infrastructure | server1 | Runtime | Custom

...under which you will find the Commerce Counter Group where you can enable it.

These are the counters that are included for each task, URL, or view. Note that all timing values are elapsed time (usually in milliseconds where appropriate):

Counter Name

Definition

Average response time

Average response time of task

Last response time

The last response time of a task.

Minimum response time

Minimum response time of a task.

Maximum response time

Maximum response time of a task.

Hits

The total number of times a task was called.

Total response time

Total response time of a task.

Standard deviation

Standard deviation of response time. The formula used to calculate the standard deviation assumes that the data conforms to a standard distribution.

If customer prefers WAS PMI feature to WebSphere Commerce performance monitoring module, the latter can be disabled by the following steps:

1. Open the WebSphere Commerce configuration file.

2. Find the component containing the class name: com.ibm.commerce.performance.monitor.PerfMonitor.

3. In the same component change the enable attribute to false.

4. Save the changes you made, and exit the file.

You have now disabled the Performance monitor. To enable it again perform steps 1 to 3 again, and change the enable attribute to true.

 

Related Concepts

Performance