Difference between revisions of "SUNScholar/Prepare Ubuntu/S08"

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<center>
 
<center>
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'''[[SUNScholar/Prepare Ubuntu|Prepare Ubuntu - Index]]'''
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  '''[[SUNScholar/Prepare Ubuntu/S09|NEXT - STEP 9]]'''
 
</center>
 
</center>
  
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==Step 8. Setup the environment variables==
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==Step 8. Configure the environment variables==
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==Step 8.1 Java  environment settings for Tomcat webapp server==
 
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To setup the environment variables for Tomcat java web applications, type the following:
 
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nano /etc/default/tomcat6
 
  
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Check the following for comparison:
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==Step 8.1 Java environment settings for other java web applications==
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<font color="red">'''*** To setup the environment variables for other java applications, type the following: ***'''</font>
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sudo nano /etc/environment
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Copy and paste the following '''to the bottom of the file'''.
 
<pre>
 
<pre>
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# You may pass JVM startup parameters to Java here. If unset, the default
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JAVA_HOME="/usr/lib/jvm/default-java"
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# options (-Djava.awt.headless=true -Xmx128m) will be used.
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JAVA_OPTS="-Djava.awt.headless=true -Xmx2048m -Xms1024m -Dfile.encoding=UTF-8"
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#JAVA_OPTS="-Djava.awt.headless=true -Xmx128m"
 
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JAVA_OPTS="-Djava.awt.headless=true -Xms1024m -Xmx2048m -XX:MaxPermSize=1024m"
 
 
</pre>
 
</pre>
  
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{{NANO}}
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Save and exit the file.
  
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===Java  environment settings used for [http://scholar.sun.ac.za SUNScholar]===
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==Step 8.2 Increase number of open files available==
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Your settings will depend on how much RAM you have available to assign to the Tomcat server. See graph below as well.
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Open the following file as follows:
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JAVA_OPTS="-Djava.awt.headless=true -Xmx8192m -Xms4096m -XX:PermSize=4096m -XX:MaxPermSize=8192m"
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  sudo nano /etc/security/limits.conf
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Add the following to '''the bottom of the file''':
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Graph of RAM memory usage on SUNScholar.
 
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[[File:Sunscholar-memory-year.png]]
 
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==Step 8.2 Java environment settings for other java web applications==
 
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To setup the environment variables for other java applications (such as the Handle and SOLR servers), type the following:
 
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  nano /etc/environment
 
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Copy and paste the following to the bottom of the file.
 
 
<pre>
 
<pre>
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JAVA_HOME="/usr/lib/jvm/java-6-sun"
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*            hard      nofile          65536
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JAVA_OPTS="-Djava.awt.headless=true -Xmx1024m -Xms512m"
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*            soft      nofile          65536
 
</pre>
 
</pre>
  
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{{NANO}}
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Save and exit the file.
  
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==Step 8.3 Increase number of open files available==
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''Make sure to check the files open parameter with the '''next computer reboot''' by typing the following as the root user:''
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Open the following file as follows:
 
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nano /etc/security/limits.conf
 
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Add the following to the bottom of the file:
 
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<pre>
 
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*            hard      nofile          65536
 
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*            soft      nofile          65536
 
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</pre>
 
  
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{{NANO}}
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ulimit -n
  
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Make sure to check the files open parameter with the next computer reboot by typing the following:
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==Step 8.3: Setup file creation permissions==
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nano $HOME/.bashrc
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Add the following to '''the bottom of the file'''.
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umask 002
  
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sudo ulimit -n
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Save and exit the file.
  
 
==References==
 
==References==
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*http://en.wikipedia.org/wiki/Java_performance
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*http://en.wikipedia.org/wiki/Environment_variable
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[[File:Sunscholar-java.png]]
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*http://wiki.apache.org/tomcat/FAQ/Memory
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*http://en.wikipedia.org/wiki/Java_performance#Memory_usage
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*http://javaperformancetuning.com
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*http://wiki.lib.sun.ac.za/index.php/SUNScholar/Optimisations
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*https://wiki.duraspace.org/display/DSDOC3x/Performance+Tuning+DSpace
  
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   '''[[SUNScholar/Prepare Ubuntu/S07|PREVIOUS]]'''
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<center>
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   '''[[SUNScholar/Prepare Ubuntu/S07|PREVIOUS - STEP 7]]'''
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</center>
  
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  '''[[SUNScholar/Prepare Ubuntu/S09|NEXT]]'''
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[[Category:Installation]]
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__NOTOC__

Latest revision as of 23:50, 9 June 2016

 NEXT - STEP 9

Step 8. Configure the environment variables

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

 PREVIOUS - STEP 7
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