About this task
The
Tivoli® Enterprise Portal client
uses the IBM® Java™ Plug-in, which is automatically installed
on your computer with the portal client. Adjust the IBM Java Plug-in
properties if performance is slow or your workstation receives HEAPDUMPs
and JAVACore files, an out-of-memory condition, when you are logged
on. Make the following adjustments to correct this problem:
- Increase the Java heap size
settings. Set the minimum heap size to 128 MB. Set the maximum heap
size to 256 MB. If you continue to experience problems, increase the
maximum setting in increments of 64 MB until the symptoms disappear.
- When memory requests by the Tivoli Enterprise Portal cannot
be satisfied from Java heap
storage, the JVM performs garbage collection to reclaim free memory.
If the Java heap size settings
are too small, the amount of time it takes to perform garbage collection
becomes excessive, resulting in high CPU utilization and poor response
time. In some cases, Java HEAPDUMPS
and JAVACore files are placed on user desktops, indicating an out-of-memory
condition. Increasing the Java heap
size parameters over the default values helps you avoid these problems.
- If you observe symptoms of heap memory exhaustion after changing
the heap size settings to the suggested values, increase the maximum
setting in increments of 64 MB until the symptoms disappear.
- Make sure the client workstation has enough memory to handle the
maximum heap size. To determine if the client workstation has sufficient
memory, observe the available physical memory (as shown on the Windows Task Manager Performance
tab) when the workstation is not running the Tivoli Enterprise Portal
client, but is running any other applications that need to run concurrently
with the portal client. Verify that the client workstation has enough
available physical memory to hold the entire maximum Java heap size for the Tivoli Enterprise Portal
plus another 150 MB. The additional 150 MB provides an allowance for
non-Java heap storage for the Tivoli Enterprise Portal and extra
available memory for use by the operating system.
- Set the Java Plug-in cache
to an unlimited size to avoid performance problems due to insufficient
cache space for Tivoli Enterprise Portal JAR files.
- If you have just upgraded to a new release or fix pack, clear
the plug-in cache to remove old versions of the Tivoli Enterprise Portal
JAR files.
Complete the following steps to adjust
the Java Plug-in settings:
Results
Note: On 64-bit systems when a 32-bit SUN JRE is already
installed, the 32-bit SUN JRE control panel appears independently
when you access Start->Control Panel->Add or Remove Programs->Java.
After installing a 64-bit SUN JRE over the 32-bit SUN JRE, the 32-bit
SUN JRE control panel disappears from the location, and the 64-bit
SUN JRE control panel appears when you access Start->Control Panel->Add
or Remove Programs->Java instead of the 32-bit SUN JRE control
panel. If you want to access the 32-bit SUN JRE control panel, use
the 32bit_jre_install_dir/bin/javacpl.exe file.