SUNScholar/Prepare Ubuntu/S08

 NEXT - STEP 9

Step 8.1 Java environment settings for other java web applications

*** To setup the environment variables for other java applications, type the following: ***

sudo nano /etc/environment

Copy and paste the following to the bottom of the file.

JAVA_HOME="/usr/lib/jvm/default-java"
JAVA_OPTS="-Djava.awt.headless=true -Xmx2048m -Xms1024m -Dfile.encoding=UTF-8"

Save and exit the file.

Step 8.2 Increase number of open files available

Open the following file as follows:

sudo nano /etc/security/limits.conf

Add the following to the bottom of the file:

*            hard       nofile          65536
*            soft       nofile          65536

Save and exit the file.

Make sure to check the files open parameter with the next computer reboot by typing the following as the root user:

ulimit -n

Step 8.3: Setup file creation permissions

nano $HOME/.bashrc

Add the following to the bottom of the file.

umask 002

Save and exit the file.

References

• http://en.wikipedia.org/wiki/Environment_variable
• http://wiki.apache.org/tomcat/FAQ/Memory
• http://en.wikipedia.org/wiki/Java_performance#Memory_usage
• http://javaperformancetuning.com
• http://wiki.lib.sun.ac.za/index.php/SUNScholar/Optimisations
• https://wiki.duraspace.org/display/DSDOC3x/Performance+Tuning+DSpace

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