You can use the Tivoli® Performance
Viewer to view Performance Monitoring Infrastructure (PMI) data in
chart or table form.
Before you begin
Tivoli Performance
Viewer monitors the performance activity of all servers on a node.
This topic assumes that one or more servers have been created and
are running on the node, and that
PMI is enabled.
제거된 기능: Tivoli Performance
Viewer 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), Tivoli Performance Viewer 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 your browser is Internet Explorer 7, the Adobe SVG installation prompt might be inaccessible.
To resolve the problem, reinstall Adobe SVG.
depfeat
In
Version 8x, the Tivoli Performance
Viewer graph uses Dojo technology for plotting the performance activity
rather than the Scalable Vector Graphics (SVG) format. The Dojo format
provides a better user experience and is more processor and memory
efficient for the application server. The SVG format is still supported
but is deprecated in Version 8 of this product. To use the SVG format
and image format, set the JVM property to false;
for example: com.ibm.websphere.tpv.DojoGraph=false.
If the property is set to false, Dojo is disabled
and Tivoli Performance Viewer
displays interactive graphics using the SVG format or non-interactive
graphics using the JPG format. When you specify to use the SVG format
by setting com.ibm.websphere.tpv.DojoGraph=false,
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), Tivoli Performance Viewer displays
the static image. If your browser is Internet Explorer 7, the Adobe SVG installation prompt might
be inaccessible. To resolve the problem, reinstall Adobe SVG. By default, this property is set
to a value of true to use the Dojo format.
About 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 Tivoli Performance
Viewer current activity settings in the administrative console.
Procedure
- Select PMI data to view.
- Click Monitoring and Tuning > Performance Viewer > Current® Activity > server_name >
Performance Modules in the console navigation tree.
- Place a check mark in the check box next to the name
of each performance module that you want to view. Expand
the tree by clicking + next to a node and shrink it by clicking – next
to a node.
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 Tivoli Performance Viewer and select those
PMs. To view the PMI page, click on Monitoring and Tuning > Performance
Monitoring Infrastructure > server_name.
- Click on View Modules. A chart
or table providing the requested data is displayed. 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. You
can add or remove counters from the chart or table by selecting or
deselecting individual counters. By default, the first three counters
for each module are shown.
You can select up
to 20 counters and display them in the Tivoli Performance Viewer 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 Tivoli Performance Viewer
log file. Refer to Tivoli Performance Viewer로 성능 데이터 로깅 for
more information on the Tivoli Performance
Viewer log file. You can view the Tivoli Performance
Viewer 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
data in a server during a particular period of time.
- Optional: To remove a module from a chart
or table, deselect the check box next to the module and click View
Modules again.
- 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.
- Optional: To view the legend for a chart,
click Show Legend. To hide the legend, click Hide Legend.
- Scale the PMI data. You can manually adjust
the scale for each counter so that the graph displays meaningful comparisons
of different counters.
- Find the counter whose scale you want to modify in the
table beneath the chart.
- Change the value for Scale as needed. Tips:
- 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.
- Click Update.
- Clear values from tables and charts.
- Ensure that one or more modules are selected under Performance
Modules in the Tivoli Performance
Viewer navigation tree
- Click Clear Buffer beneath the chart or table. The PMI data is removed from a table or chart.
- Reset counters to zero (0).
- Ensure that one or more modules are selected under Performance
Modules in the Tivoli Performance
Viewer navigation tree
- Click Reset to Zero beneath the chart or table. Reset to Zero sets a new baseline using the current
counter readings at the instant the button is clicked. Future datapoints
are plotted on the graph relative to their position at the time Reset
to Zero is clicked. Datapoints gathered prior to the time Reset
to Zero is clicked are not displayed, although they are still
held in the Tivoli Performance
Viewer buffer. If Undo Reset to Zero is clicked again, Tivoli Performance Viewer displays
all data recorded from the original baseline, not from the Reset
to Zero point.
For information on how Tivoli Performance Viewer displays the data,
see Tivoli Performance Viewer 설정 구성.