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13. Performance Tuning

JVM

The JVMs supported by Oracle Transportation Management vary by platform. Each JVM has a set of

parameters which can be used to tune the performance of the JVM. Most of these parameters affect

the memory management process referred to as garbage collection. Oracle Transportation

Management ships with a default set of these parameters to be used as a starting point for JVM

tuning. Changing these parameters can have a significant impact on the overall performance of the

system. Therefore, changes should be well documented and made incrementally with thorough

performance testing.

Changing Memory Settings

As your server load varies, you may need to change the amount of memory that is allocated to the

Oracle Transportation Management instance. You can change the amount of memory allocated to both

Tomcat and WebLogic.

Tomcat is the Java servlet server that Oracle Transportation Management uses. Increasing the amount

of memory that it can utilize allows more Oracle Transportation Management concurrent users and

improves the speed of some integration tasks.

WebLogic is the application server that Oracle Transportation Management runs within. Increasing the

amount of memory that is has improves performance of business logic functions.

After making any memory changes, you need to stop and restart Oracle Transportation Management,

as described starting on page in the chapter Starting and Stopping the Oracle Transportation

Management Servers. The instructions below describe how to make these changes.

UNIX and Microsoft Windows

To change the amount of memory that Tomcat uses, edit <otm_install_path>/tomcat/bin/tomcat.conf

and modify the following lines:

jvm.arg=-Xms[TOMCAT_MEMORY]m

jvm.arg=-Xmx[TOMCAT_MEMORY]m

[TOMCAT_MEMORY] will be some integer value that represents the amount of memory (in megabytes)

to use. For instance, if you changed this to 2.2GB, the line would read:

jvm.arg=-Xms2200m

jvm.arg=-Xmx2200m

To change the amount of memory that WebLogic uses edit

<otm_install_path>/weblogic/weblogic.conf:

jvm.arg=-Xms[WEBLOGIC_MEMORY]m

jvm.arg=-Xmx[WEBLOGIC_MEMORY]m

If you change this value to 2.2GB, it would look like:

jvm.arg=-Xms2200m

jvm.arg=-Xmx2200m

In all cases, restart your Oracle Transportation Management instance to make these changes take

effect.

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