Set JAVA_HOME for user!

[obiee@PTUD-VM01-2 ~]$ cat .bash_profile 
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

#JAVA_HOME
export JAVA_HOME=/u01/obiee/setup/jdk
export PATH=$JAVA_HOME/bin:$PATH

Monitoring memory and CPU using JVisualVM

[oracle@App1 ~]$ export JAVA_HOME=/u01/app/software/jdk/
[oracle@App1 ~]$ cd $JAVA_HOME/bin
[oracle@App1 bin]$ ls
appletviewer  javac           jconsole  jps         native2ascii  serialver
apt           javadoc         jcontrol  jrunscript  orbd          servertool
ControlPanel  javafxpackager  jdb       jsadebugd   pack200       tnameserv
extcheck      javah           jhat      jstack      policytool    unpack200
idlj          javap           jinfo     jstat       rmic          wsgen
jar           java-rmi.cgi    jmap      jstatd      rmid          wsimport
jarsigner     javaws          jmc       jvisualvm   rmiregistry   xjc
java          jcmd            jmc.ini   keytool     schemagen
[oracle@App1 bin]$ ./jvisualvm 

How to upgrade java version

[omss@ptud ~]$ java -version
java version "1.7.0_65"

[root@ptud omss]# ln -s -v /home/omss/jdk/bin/java /usr/bin/java
`/usr/bin/java' -> `/home/omss/jdk/bin/java'

[root@ptud omss]# ln -s -v /home/omss/jdk/bin/javac /usr/bin/javac
ln: creating symbolic link `/usr/bin/javac': File exists
[root@ptud omss]# rm -fr  /usr/bin/javac
[root@ptud omss]# ln -s -v /home/omss/jdk/bin/javac /usr/bin/javac
`/usr/bin/javac' -> `/home/omss/jdk/bin/javac'

[root@ptud omss]# java -version
java version "1.7.0_80"

java.lang.OutOfMemoryError: PermGen space

On 64 bit platforms, the MaxPermSize should be set to 512M. Before launching the Installer, you can set the MaxPermSize in the environment as follows:
export _JAVA_OPTIONS=-XX:MaxPermSize=512m
If the MaxPermSize is not set to 512M, you will see the following error message:
java.lang.OutOfMemoryError: PermGen space