Page Comparison

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• JDK 1.6 update 21 or later (JDK 1.7 is not supported as of 2014/08; the SSP development team has also observed somewhat better GC performance with the Sun/Oracle JDK vs OpenJDK)
  
  • Download Location: http://java.sun.com

  • Environment Variable: JAVA_HOME

    Tip
    title Java Environment Variable
    JAVA_HOME=/path/to/your/java (ie: /usr/local/java or C:\java\jdk) (optional) PATH= append the bin subdirectory to the path statement

• Tomcat 6.X (Tomcat 7 is not supported as of 2014/04)

  • Instructions for installing and configuring Tomcat for the SSP-Platform (uPortal 4.0)

    Warning
    title Tomcat Configuration
    It is important to complete sections: Environment Variables, Shared Libraries, Shared Sessions, Java Heap.  Minimally, the catalina.properties file must contain:   shared.loader=${catalina.base}/shared/lib/*.jar   And your active connector/s in <tomcat>/conf/server.xml must have the emptySessionPath flag set:   <Connector port="8080" protocol="HTTP/1.1"     connectionTimeout="20000" redirectPort="8443" emptySessionPath="true"/> And increase the heap in <tomcat>/bin/setenv.sh (*nix) or <tomcat>/bin/setenv.bat (Windows). Smaller sizing is probably feasible, but the examples below match what our SSP CI envs run with. For production systems, start with a max heap of roughly half available physical memory and increase from there if necessary. The uPortal instructions above recommend using JAVA_OPTS for heap sizing. This can lead to problems on memory constrained systems because JAVA_OPTS will be used when trying to stop Tomcat with its own scripts. You don't typically need a large heap at all for that operation. So CATALINA_OPTS is a better choice for sizing the heap in setenv scripts, because that var will only be used for Tomcat's http-serving runtime. setenv.sh: CATALINA_OPTS=-Xms2G -Xmx2G -XX:PermSize=256m -XX:MaxPermSize=256m setenv.bat (uPortal instructions linked to above are missing the 'set'): set CATALINA_OPTS=-Xms2G -Xmx2G -XX:PermSize=256m -XX:MaxPermSize=256m

  • Additionally, a performance improvement has been experienced by enabling compression in Tomcat

    Tip
    Add compression="force" to the server.xml in the connector like the following:   <Connector port="8080" protocol="HTTP/1.1 connectionTimeout="20000" redirectPort="8443" emptySessionPath="true" compression="force" />

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