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. Deprecated feature: 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.
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.
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.
Note: When you create a second application
server under WebSphere® Application Server, Tivoli Performance Viewer cannot display the PMI data for the
second application server such as WebSphere Portal
Server.
Procedure