Viewing TPV performance modules

Use the Tivoli Performance Viewer (TPV) to view Performance Monitoring Infrastructure (PMI) data in chart or table form.

 

Before you begin

TPV monitors the performance activity of all servers on a node. This article assumes that one or more servers have been created and are running on the node, and that PMI is enabled.

 

Overview

You view performance modules when your server is experiencing performance problems. For example, a common performance problem occurs when individual sessions are too large. To help view data on a session, one can view the Servlet Session Manager PMI module and monitor the SessionObjectSize counter to make sure that Session Object Size is not too large.

Performance modules are shown in the TPV current activity settings in the administrative console.

 

Steps for this task (dependent on configuration)

  • Select PMI data to view.

    1. Click...

        Monitoring and Tuning > Performance Viewer > Current Activity > servername > Performance Modules

    2. Place a check mark in the check box beside the name of each performance module that you want to view.

      Expand the tree by clicking + next to a node and it by clicking – next to a node.

    3. Click on View Modules.

      A chart or table providing the requested data is displayed on the right side of the page. Charts are displayed by default.

      Each module has several counters associated with it.

      These counters are displayed in a table underneath the data chart or table.

      Selected counters are displayed in the chart or table. We can add or remove counters from the chart or table by selecting or deselecting the check box next to them. By default, the first three counters for each module are shown.

    4. Optional: To remove a module from a chart or table, deselect the check box next to the module and click View Modules again.

    5. Optional: To view the data in a table, click View Table on the counter selection table.

      To toggle back to a chart, click View Graph.

  • Scale the PMI data.

    We can manually adjust the scale for each counter so that the graph displays meaningful comparisons of different counters.

    1. Find the counter whose scale you want to modify in the table beneath the chart.

    2. Change the value for Scale as needed.

      • When the scale is set to 1 the true value of the counter is displayed in the graph.

      • A value greater than 1 indicates that the value is amplified by the factor shown.

      • A value less than 1 indicates that the variable is decreased by the factor shown.

      For example, a scale setting of .5 means that the counter is graphed as one-half its actual value. A scale setting of 2 means that the counter is graphed as twice its actual value. Scaling only applies to the graphed values and has no effect on the data displayed when viewing it in table form.

    3. Click Update.

  • Clear values from tables and charts.

    1. Ensure that one or more modules is selected under Performance Modules in the TPV navigation tree

    2. Click Clear Buffer beneath the chart or table.

      The PMI data is removed from a table or chart. Clear Buffer works by displaying only data with a timestamp newer than the time at which the button was clicked. If Clear Buffer is clicked again before the buffer is filled with new data, TPV displays all data currently in the buffer.

  • Reset counters to zero (0).

    1. Ensure that one or more modules is selected under Performance Modules in the TPV navigation tree

    2. Click Reset to Zero beneath the chart or table.

    Some counters report relative values based on how much the value has changed since the counter was enabled. Reset to Zero resets those counters so that they report changes in values since the reset operation. Reset to Zero also clears the buffer. See "Clear values from tables and charts" above for more information about clearing the buffer.

    Counters based on absolute values cannot be reset and are not affected by clicking Reset to Zero.


 

Related Tasks


Configuring TPV settings
Monitoring performance with Tivoli Performance Viewer (TPV)

 

See Also


Using the Tivoli Performance Viewer
Tivoli Performance Viewer view logged data