You can 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.TPV displays graphics in either the Scalable Vector Graphics (SVG) format or as a static image in the JPG format. If you do not have the Adobe SVG browser plug-in installed, you are prompted to download and install it. If you select not to install the plug-in (by selecting Cancel), TPV displays the static image. Installing the Adobe SVG plug-in is advantageous for several reasons. First, the SVG format provides interactive graphics that provide additional information when you hover your mouse over a point, line, or legend item. The SVG format also enables you to click a point and see details for it. Secondly, using the SVG format provides a performance benefit because the work to display the SVG image is done on the client side. When viewing a static image, the application server must convert the SVG image into a static image, which is a processor and memory intensive operation.
If you experience problems with SVG, see Problems with Scalable Vector Graphics for more information.
Why and when to perform this task
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, you 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
If you do not see all the PMI counters you expect, or a PM you are interested in is visible but cannot be selected, PMI is not enabled for that particular counter or for any counter in that PM. Go to the PMI control area of the administrative console and enable PMI for any counters you wish to view, then return to TPV and select those PMs. To view the PMI page, click on Monitoring and Tuning > Performance Monitoring Infrastructure > server_name.
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. You 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.
You can select up to 20 counters and display them in the TPV in the Current Activity mode. The data from all the PMI counters that are currently enabled in each PM for all active instances of the PM can be recorded and captured in a TPV log file. Refer to Logging performance data with TPV for more information on the TPV log file. You can view the TPV log file for a particular time period multiple times, selecting different combinations of up to 20 counters each time. You have the flexibility to observe the relationships among different performance measures in the server during a particular period of time.
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.
For information on how TPV displays the data, see Configuring TPV settings.
Related tasks
Configuring TPV settings
Monitoring performance with Tivoli Performance Viewer (TPV)
Related reference
Using the Tivoli Performance Viewer
Tivoli Performance Viewer view logged data