Cognos ReportNetTM Installation and Configuration Guide
Cognos ReportNetTM Installation and Configuration Guide
Cognos ReportNetTM Installation and Configuration Guide
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Chapter 7: Advanced <strong>Configuration</strong> Options<br />
Advanced configuration options are changes that you make after installation to the configuration<br />
properties of the resources that ReportNet components use.You cannot use <strong>Cognos</strong><br />
<strong>Configuration</strong> to make these changes. Advanced configuration options enhance security,<br />
improve performance, or change the default behavior of ReportNet.<br />
Change the JVM Used by ReportNet<br />
To better suit your reporting environment, you can change which Java Virtual Machine (JVM)<br />
ReportNet uses, using the following criteria:<br />
• Java HotSpot Client VM<br />
Use this JVM for proof of concept, demonstration, or development environments. This JVM<br />
is specially tuned to reduce both the startup time for applications <strong>and</strong> the memory footprint.<br />
This is the default setting for ReportNet installation on Windows. On UNIX platforms,<br />
<strong>Cognos</strong> does not provide a Java Runtime Environment (JRE). Therefore, the default JVM<br />
that ReportNet uses depends on the current setting in your existing JRE.<br />
• Java HotSpot Server VM<br />
Use this JVM for long-running server applications to maximize operating speeds when<br />
performance is more important than fast startup time.<br />
• Classic VM<br />
For compatibility reasons, you may have to use the Classic VM. Not all Java Development<br />
Kits (JDKs) have a Classic VM. In UNIX, if you are using JavaSoft Solaris JDK 1.3 or any of<br />
the JavaSoft 1.4 JDKs, you have only the HotSpot VM.<br />
For more information, see the Sun Microsystems Inc. Web site.<br />
Because all application servers, such as Tomcat, WebLogic, <strong>and</strong> WebSphere, require a JVM to<br />
run, you must already have one installed.<br />
Steps<br />
1. Go to the location where your Java Runtime Environment (JRE) libraries are installed:<br />
• In Windows, go to crn_location\bin\jre\1.3.1\lib.<br />
• In UNIX, go to JAVA_HOME/jre/lib.<br />
2. Open jvm.cfg in an editor.<br />
3. Ensure that the JVM that you want to use is the first uncommented line. Enter the<br />
appropriate text for the JVM you want to use:<br />
JVM<br />
Hotspot Client<br />
Hotspot Client<br />
Classic<br />
Text<br />
hotspot<br />
server<br />
classic<br />
4. Save <strong>and</strong> close the file.<br />
<strong>Installation</strong> <strong>and</strong> <strong>Configuration</strong> <strong>Guide</strong> 77
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