Question regarding shared_pool sizes in Oracle 11gR2

Hi! I administer an Oracle 11gR2 database that runs on IBM hardware, OS AIX 6.1. The LPAR has 44 Gb of available memory and 8 dual-core processors assigned.
Normally, everything runs fine and we have no problems. Today the database started rejecting connections suddenly. The issue lasted for about 14 minutes and then cleared itself. When checking the alert log, it indicated an out of memory problem with the shared_pool, ORA-4031 error.
I am utilizing the automatic memory management feature of 11g, and memory_max_target is set to 14 Gb. I am going to increase memory_max_target to 18 Gb as part of my solution, but will that also then increase the size of the shared_pool in the SGA? Is it best to let the database manage the size of the shared_pool, or can (and should) I set it to a minimum size?
Any help, or links to documentation or MOS notes, is greatly appreciated. Thank you!
Mark

Before suggesting you change your memory managment in use I would want more information such as how long have your been running the system this way?  How long had the system been running since its last startup?
If you have access to the AWR then what does the AWR report for the problem period show?  Any unusual activity?  Were any new features or major processing added to the application recently.
When you look at the memory management views how frequently does Oracle move granules from PGA to SGA, from the buffer cache to the shared pool and so on.
The following support note may help with trying to investigate what issues you face in relation to ORA-04031 providing the issue re-occurs.
Oracle document# 1088239.1 Master Note for Diagnosing ORA-4031
HTH -- Mark D Powell --

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    cat > /etc/init.d/oracle-mount <<-EOF
    #! /bin/sh
    # /etc/init.d/oracle-mount
    VOL_UUID=alphanumeric
    VOL_LABEL=oraclexe
    VOL_SYMLINK=/u01
    mount=/usr/bin/pmount
    uuid2dev() {
       VOL_DEVICE="\`blkid | grep \$VOL_UUID | awk '{print \$1}'\`"
       VOL_DEVICE="\`echo \$VOL_DEVICE | tr -d ':'\`"
       echo \$VOL_DEVICE
    case "\$1" in
      start)
        echo "Starting script /etc/init.d/oracle-mount"
        uuid2dev
        \$mount \$VOL_DEVICE \$VOL_LABEL
        if [ -d /media/\$VOL_LABEL ]; then
           echo "Mount \$VOL_DEVICE success"
           ln -sf /media/\$VOL_LABEL \$VOL_SYMLINK
        else
           echo "Error mouting \$VOL_DEVICE"
        fi
      stop)
        echo "Stopping script /etc/init.d/oracle-mount"
        uuid2dev
        /bin/umount \$VOL_DEVICE 2>/dev/null
        if [ "\`/usr/bin/pmount | /bin/grep \$VOL_DEVICE\`" ]; then
           echo "Error unmounting \$VOL_DEVICE"
        else
           rm -f \$VOL_SYMLINK
        fi
        echo "Usage: /etc/init.d/oracle-u01 {start|stop}"
        exit 1
    esac
    ### BEGIN INIT INFO
    # Provides:          oracle-mount
    # Required-Start:    \$remote_fs \$syslog
    # Required-Stop:     \$remote_fs \$syslog
    # Default-Start:     2 3 4 5
    # Default-Stop:      0 1 6
    # Short-Description: Start daemon at boot time
    # Description:       Mount hotplug-usb drive and create symlink
    ### END INIT INFO
    EOF
    {code}
    Install the oracle-mount init script:
    {code}
    chmod 755 /etc/init.d/oracle-mount
    update-rc.d oracle-mount defaults 01 99
    {code}
    Get the UUID of the volume "oraclexe" and update the VOL_UUID in the init script accordingly:
    {code}
    uuid=`blkid | grep oraclexe | awk '{print $3}'`
    echo $uuid
    sed -i "s/^VOL_UUID=.*/VOL_$uuid/g" /etc/init.d/oracle-mount
    {code}
    The UUID of your device will be a unique number, but should be similar to:
    {code}
    UUID="3f5e9963-b328-49f3-b3e8-a3561ae34106"
    {code}
    Logout of root and test the init script:
    {code}
    exit
    sudo /etc/init.d/oracle-mount stop
    ls /u01
    sudo /etc/init.d/oracle-mount start
    ls /u01
    {code}
    Your output should look like:
    {code}
    Stopping script /etc/init.d/oracle-mount
    /dev/sdb1
    ls: cannot access /u01: No such file or directory
    Starting script /etc/init.d/oracle-mount
    /dev/sdb1
    Mount /dev/sdb1 success
    lost+found
    {code}
    h2. 7) ORA-00845: MEMORY_TARGET
    Oracle 11gR2 XE under Ubuntu 11.10 will result in "ORA-00845: MEMORY_TARGET not support on this system" either at Oracle database startup or during the initial installation. Ubuntu 11.10 uses a new version of the "systemd" system and session manager and has migrated away from /dev/shm and other common directories in favor of /run.
    There are several ways how to address the problem. You can either enable /dev/shm shared memory, or change the default memory management of Oracle 11g from AMM (Automatic Memory Management) to ASMM (Automatic Shared Memory Management) as it was in used the previous 10g version. Since AMM is one of the new features of 11g, the following will show you how to make to make AMM work.
    Login as root:
    {code}
    sudo su -
    {code}
    Cut & paste the following into the command prompt (not a text editor):
    {code}
    cat > /etc/init.d/oracle-shm <<-EOF
    #! /bin/sh
    # /etc/init.d/oracle-shm
    case "\$1" in
      start)
        echo "Starting script /etc/init.d/oracle-shm"
        # Run only once at system startup
        if [ -e /dev/shm/.oracle-shm ]; then
          echo "/dev/shm is already mounted, nothing to do"
        else
          rm -f /dev/shm
          mkdir /dev/shm
          mount -B /run/shm /dev/shm
          touch /dev/shm/.oracle-shm
        fi
      stop)
        echo "Stopping script /etc/init.d/oracle-shm"
        echo "Nothing to do"
        echo "Usage: /etc/init.d/oracle-shm {start|stop}"
        exit 1
    esac
    ### BEGIN INIT INFO
    # Provides:          oracle-shm
    # Required-Start:    $remote_fs $syslog
    # Required-Stop:     $remote_fs $syslog
    # Default-Start:     2 3 4 5
    # Default-Stop:      0 1 6
    # Short-Description: Bind /run/shm to /dev/shm at system startup.
    # Description:       Fix to allow Oracle 11g use AMM.
    ### END INIT INFO
    EOF
    {code}
    Install the oracle-shm init script:
    {code}
    chmod 755 /etc/init.d/oracle-shm
    update-rc.d oracle-shm defaults 01 99
    {code}
    Restart the system:
    {code}
    reboot
    {code}
    Verify the success:
    {code}
    sudo cat /etc/mtab | grep shm
    {code}
    {code}
    none /run/shm tmpfs rw,nosuid,nodev 0 0
    /run/shm /dev/shm none rw,bind 0 0
    {code}
    The upper limit of shared memory under Linux is set to 50 % of the installed RAM by default. If your system has less than 2 GB of RAM installed, there is still a chance to run into ORA-00845 error if your shared memory is used by other software.
    The verify available shared memory, type the following commands:
    {code}
    sudo df -h /run/shm
    {code}
    h2. 8) Installing Oracle 11gR2 Express Edition
    The final release version of Oracle 11gR2 Express Edition can be downloaded for free at http://otn.oracle.com/database/express-edition/downloads. The software should automatically downloaded into the "Downloads" folder of your home directory.
    Enter the following commands to unpack the installer:
    {code}
    cd ~/Downloads
    unzip oracle-xe-11.2.0-1.0.x86_64.rpm.zip
    rm oracle-xe-11.2.0-1.0.x86_64.rpm.zip
    {code}
    The Debian Linux based package management of Ubuntu is not compatible with the Red Hat package manager. The Oracle installer needs to be converted using the following commands:
    {code}
    cd ~/Downloads/Disk1
    sudo alien --to-deb --scripts oracle-xe-11.2.0-1.0.x86_64.rpm
    (This may take a few minutes)
    rm oracle-xe-11.2.0-1.0.x86_64.rpm
    {code}
    The following needs to be set for compatibility:
    {code}
    sudo ln -s /usr/bin/awk /bin/awk
    sudo mkdir /var/lock/subsys
    {code}
    Ubuntu uses different tools to manage services and system startup scripts. The "chkconfig" tool required by the Oracle installer is not available in Ubuntu. The following will create a file to simulate the "chkconfig" tool.
    Login as root:
    {code}
    sudo su -
    {code}
    Copy & paste the following *directly* into the command prompt to create a file:
    {code}
    cat > /sbin/chkconfig <<-EOF
    #!/bin/bash
    # Oracle 11gR2 XE installer chkconfig hack for Debian based Linux (by dude)
    # Only run once.
    echo "Simulating /sbin/chkconfig..."
    if [[ ! \`tail -n1 /etc/init.d/oracle-xe | grep INIT\` ]]; then
    cat >> /etc/init.d/oracle-xe <<-EOM
    ### BEGIN INIT INFO
    # Provides:                  OracleXE
    # Required-Start:        \\\$remote_fs \\\$syslog
    # Required-Stop:        \\\$remote_fs \\\$syslog
    # Default-Start:            2 3 4 5
    # Default-Stop:            0 1 6
    # Short-Description:   Oracle 11g Express Edition
    ### END INIT INFO
    EOM
    fi
    update-rc.d oracle-xe defaults 80 01
    EOF
    {code}
    Exit root:
    {code}
    exit
    {code}
    Set execute privileges:
    {code}
    sudo chmod 755 /sbin/chkconfig
    {code}
    Install Oracle 11gR2 Express Edition entering the following commands:
    {code}
    cd ~/Downloads/Disk1
    sudo dpkg --install ./oracle-xe_11.2.0-2_amd64.deb
    (This may take a couple of minutes)
    {code}
    Run the configuration script to create (clone) the database and follow the screen. Accept the default answers, including "y" to startup the database automatically, or modify as required.
    {code}
    sudo /etc/init.d/oracle-xe configure
    (This can take a few minutes - the installation completed successfully.)
    {code}
    To verify success, the procedure should end showing:
    {code}
    Starting Oracle Net Listener...Done
    Configuring database...Done
    Starting Oracle Database 11g Express Edition instance...Done
    Installation completed successfully.
    {code}
    Set a password for the Oracle account:
    {code}
    sudo passwd oracle
    {code}
    h2. 9) Post-Installation
    In order to use sqlplus and other tools, the Oracle account requires specific environment variables. The following will set these variables automatically at every Oracle login:
    Login as the Oracle user:
    {code}
    su - oracle
    {code}
    Copy the default account skeleton files and add the Oracle env script to .profile:
    {code}
    cp /etc/skel/.bash_logout ./
    cp /etc/skel/.bashrc ./
    cp /etc/skel/.profile ./
    echo "" >>./.profile
    echo '. /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh' >>./.profile
    {code}
    By default, the Oracle Database XE graphical user interface is only available at the local server, but not remotely. The following will enable remote logins:
    Login as the Oracle user:
    {code}
    su - oracle
    {code}
    Login as SYSDBA and execute the following:
    {code}
    sqlplus / as sysdba
    SQL> EXEC DBMS_XDB.SETLISTENERLOCALACCESS(FALSE);
    exit
    {code}
    See http://download.oracle.com/docs/cd/E17781_01/admin.112/e18585/toc.htm for more information.
    h3. a) Unity desktop configurations
    The Oracle XE menu under the previous Gnome Classic desktop shows several useful scripts to backup the database, start and stop the database, etc. Under the Unity based desktop this menu is not available. You can either switch to the Gnome Classic desktop as outlined in chapter 2, or perform the following steps to modify and copy the scripts as outlined below. The start and stop database scripts will also be modified to perform a progress feedback.
    Login as user root:
    {code}
    sudo su -
    {code}
    Convert desktop files:
    {code}
    cd /usr/share/applications
    sed -i 's/Categories.*/Categories=Database;Office;Development;/g' oraclexe*
    sed -i 's/MultipleArgs/X-MultipleArgs/g' oraclexe*
    sed -i 's/MimeType.*/MimeType=application\/x-database/g' oraclexe*
    sed -i 's/.png//g' oraclexe*
    sed -i 's/Terminal=false/Terminal=true/g' oraclexe-startdb.desktop
    sed -i 's/Terminal=false/Terminal=true/g' oraclexe-stopdb.desktop
    {code}
    Exit root:
    {code}
    exit
    {code}
    Login as user Oracle:
    {code}
    su - oracle
    {code}
    Modify database start and stop scripts:
    {code}
    cd /u01/app/oracle/product/11.2.0/xe/config/scripts
    cp startdb.sh start.sh_orig
    cp stopdb.sh stopdb.sh_orig
    sed -i 's/>.*//g' startdb.sh
    sed -i 's/>.*//g' stopdb.sh
    {code}
    You will need SYSDBA privileges and set Oracle environment variables in order to use your regular user account.
    Login to your regular user account:
    {code}
    su - dude
    {code}
    Enter the folowing command:
    {code}
    sudo usermod -a -G dba dude
    {code}
    Then update your profile to automatically set the necessary Oracle environment variables:
    {code}
    echo "" >>./.profile
    echo '. /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh' >>./.profile
    {code}
    Update your Desktop folder to contain useful Oracle XE scripts:
    {code}
    cp /usr/share/applications/oraclexe* ~/Desktop
    chmod 750 ~/Desktop/oraclexe*
    {code}
    To verify success re-login and try "sqlplus":
    {code}
    su - oracle
    sqlplus / as sysdba
    {code}
    h2. 10) Tips and Troubleshooting
    h3. 10. a) Port 1521 appears to be in use by another application
    Error: Port 1521 appears to be in use by another application. Specify a different port.This error happens after a previously unsuccessful configuration attempt using /etc/init.d/oracle-xe configure script. The script was able to start the Listener process, but most likely failed to continue  to clone the database, e.g. ORA-00845. The following should correct the problem:
    Determine the oracle listener process that is already running:
    {code}
    $ ps -ef | grep oracle
    {code}
    Your output should be similar to:
    {code}
    oracle   19789     1  0 19:46 ?        00:00:00 /u01/app/oracle/product/11.2.0/xe/bin/tnslsnr
    {code}
    Then kill the process, using the appropriate process id, for instance:
    {code}
    $ sudo kill -9 19789
    {code}
    h3. 10.b) cannot touch `/var/lock/subsys/listener': No such file or directory
    Starting Oracle Net Listener...touch: cannot touch `/var/lock/subsys/listener': No such file or directoryThis error occurs when you run /etc/init.d/oracle-xe configure, but failed the preinstallation step to create the /var//lock/subsys directory as outlined in chapter 8.
    h3. 10.c) ORA-00845: MEMORY_TARGET
    ORA-00845: MEMORY_TARGET not supported on this system See chapter 7 to enable /dev/shm and verify free space available in /run/shm
    h3. 10.d) Apex ADMIN password
    According to the Oracle documentation, the password for the INTERNAL and ADMIN Oracle Application Express user accounts is initially the same as the SYS and SYSTEM administrative user accounts. Well, I tried several times without success. To reset the Apex Admin password:
    Login as user oracle:
    {code}
    su - oracle
    {code}
    Login as SYSDBA and type the following:
    {code}
    sqlplus / as sysdba
    {code}
    At the SQL prompt, type the following to be prompted to change the password:
    {code}
    SQL> @?/apex/apxxepwd.sql
    exit
    {code}
    When done, open your browser and go to http://127.0.0.1:8080/apex
    Workspace: Internal
    Username: ADMIN
    Password: password you set with apxxepwd.sql
    I will prompt you to reset the password:
    old password: password you set with apxxepwd.sql
    new password: final_password
    You can also login as the Apex Admin using http://127.0.0.1:8080/apex/apex_admin
    h3. 10.e) SYS and SYSTEM password
    Use the following commands to reset the SYS and SYSTEM passwords if necessary:
    Login as the Oracle user:
    {code}
    su - oracle
    {code}
    Login as SYSDBA and type the following at the SQL prompt:
    {code}
    sqlplus / as sysdba
    SQL> alter user sys identified by "password" account unlock;
    SQL> alter user system identified by "password" account unlock;
    SQL> exit
    {code}
    h3. 10.f) Uninstall Oracle 11g XE
    The following will completely uninstall and remove Oracle 11g XE:
    Open a terminal seesion and login as user root:
    {code}
    sudo su -
    {code}
    Enter the following:
    {code}
    /etc/init.d/oracle-xe stop
    dpkg --purge oracle-xe
    rm -r /u01/app
    rm /etc/default/oracle-xe
    update-rc.d -f oracle-xe remove
    update-rc.d -f oracle-mount remove
    update-rc.d -f oracle-shm remove
    {code}
    h3. 10.g) Reconfigure Oracle 11g XE
    Type the following commands in a terminal window:
    {code}
    sudo /etc/init.d/oracle-xe stop
    sudo rm /etc/default/oracle-xe
    sudo /etc/init.d/oracle-xe configure
    {code}
    h3. 10.h) Gnome Classic desktop
    Ubuntu 11 moved from the Gnome Classic desktop to Unity and removed the "Ubuntu Classic" login option. Unity was designed to make more efficient use of space given a limited screen size and touch screens. If you prefer to use the Gnome Classic desktop, enter the following into a terminal window:
    {code}
    sudo apt-get install gnome-panel
    {code}
    To log into the Gnome Classic desktop, select the "Gearwheel" at the login screen and select "Gnome Classic".
    h3. 10.i) Unix vi cursor keys
    The instructions in this tutorial do not require the use of any text editor. However, if you would like use the backspace and cursor keys in the "vi-editor", the following needs to be installed:
    {code}
    sudo apt-get install vim
    {code}
    h3. 10.j) Backup Database
    In order to perform an online database backup using the supplied "Backup Database" script, the database needs to run in Archive-Log mode. This can be setup using the following commands:
    Login as the Oracle user:
    {code}
    su - oracle
    {code}
    Login as SYSDBA and type the following:
    {code}
    sqlplus / as sysdba
    SQL> shutdown immediate
    SQL> startup mount
    SQL> alter database archivelog;
    SQL> alter database open;
    SQL> exit
    {code}
    h2. 11) History
    Version: A, 24-Oct-2011
    - first release
    Version: B, 25-Oct-2011
    - reduced instructions.
    - corrected errors in 6a and 8.
    - new strategy addressing ORA-00845 error.
    - rework of chapter 10.
    Version: C, 30-Nov-2011
    - corrected typo in 6a
    - new procedures in 9a.
    - added progress feedback to database scripts.
    Version D, 14-Jan-2012
    - corrected presentation errors.
    - reorganized instructions.
    h3. 12) References
    http://download.oracle.com/docs/cd/E17781_01/install.112/e18802/toc.htm
    http://askubuntu.com/questions/57297/why-has-var-run-been-migrated-to-run
    http://lwn.net/Articles/436012/
    https://forums.oracle.com/forums/thread.jspa?threadID=2300750&tstart=0
    Kind regards and best of luck!
    Dude.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

    Excellent Blog. Thank You
    Small clarification on Step **6) Oracle Home Directory, ...a) Resize the Root Partition**
    Ubuntu 11.10 has Gparted available as a Ubuntu software download, DONT use that while trying the above step, instead download the ISO file from http://sourceforge.net/projects/gparted/files/gparted-live-stable/ gparted-live-0.12.0-5.iso (124.6 MB)
    Burn that ISO file on a Blank DVD, reboot the Ubuntu , during startup select Boot from DVD Option if not already selected. this will take to Boot Menu Options of Gparted Live then select the first menu option, and this allows to do further action such as Re-sizing .
    and once you have chosen and executed step a) . do NOT run step b) also that is "Setup External Storage"
    I hope this minor clarification can avoid some confusion
    Regards
    Madhusudhan Rao
    Edited by: MadhusudhanRao on Mar 24, 2012 11:30 PM

  • If we use result_cache_mode=force in oracle 11gr2 database then we don't ..

    If we use result_cache_mode=force in oracle 11gr2 database then we don't need QSEl (third party software).
    is the result cache feature is work same as qsel.
    I am not able to find anything regarding it..please help...
    http://www.qsel4oracle.com/FramePage_files/FramePageData.htm

    I don't know anything about QSEL, but can guess that it is some sort of caching solution sitting on Oracle.
    Ideally, RESULT_CACHE_MODE should not be set to FORCE, as it will try to cache each and every SQL (and its results for different bind values).
    But, if you have reasonably big SGA and within that SGA, if you have reasonably big result cache and you do RESULT_CACHE_MODE=FORCE, then you might not need third party caching solution.
    Key question is, how big is reasonably big? that depends on size of data you are dealing with.
    Good thing about result caching is, it works for user defined functions as well.
    Also, you can enable result caching in certain sessions and disable it in certain session.

  • Install Oracle 11gR2 Express Edition on Ubuntu Linux 11.04 (64-bit) Howto

    h2. Install Oracle 11gR2 Express Edition on Ubuntu Linux 11.04 (64-bit) Howto
    Version: B
    Author: Dude, 24. May 2011
    The following are step by step instructions how to install Oracle 11gR2 Express Edition (Beta) under Linux Ubuntu 11.04, 64-bit.
    Access to the Internet is required.
    The instructions cover the following additional topics:
    - Converting Red Hat based Oracle XE installer to Ubuntu.
    - Work-around for missing /sbin/chkconfig tool.
    - Install Oracle XE into a different directory or disk volume.
    - Relocate and configure the Oracle user and default login directory.
    - Uninstall, reconfigure and perform first database backup.
    - Notes and web links.
    - Troubleshooting
    h3. A) System Setup and Prerequisites
    h4. A.1. System Access
    You will need terminal command line, root and system console access to perform the setup tasks.
    To open a Terminal at the system console:
    Menu Applications > Accessories > TerminalThe following commands will enable remote ssh login with root access:
    sudo apt-get install openssh-server
    sudo passwd root
    Verify:
    ssh root@xe_server_host_nameh4. A.2. Software Prerequisites
    The following is required in order to install Oracle 11gR2 XE:
    sudo apt-get install alien libaio1 unixodbcThe following is not required, but it will fix backspace and arrow keys in case you prefer using the vi-editor:
    sudo apt-get install vimh4. A.3. System Swap space
    Minimum swap space required is 2 GB. You can increase swap space if necessary using a swap file:
    To analyze current swap space and memory configuration:
    sudo cat /proc/meminfo
    To install a 1 GB swapfile named swapfile in /, for example:
    sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576
    (this may take a while)
    sudo mkswap /swapfile
    sudo swapon /swapfile
    sudo cp /etc/fstab /etc/fstab.orig
    sudo echo '/swapfile swap swap defaults 0 0' >> /etc/fstab
    Verify:
    sudo swapon -a
    sudo swapon -sh4. A.4. Kernel Parameters
    Oracle 11g XE requires the following additional kernel parameters:
    sudo nano /etc/sysctl.d/60-oracle.conf
    (Enter the following)
    # Oracle 11g XE kernel parameters
    fs.file-max=6815744
    net.ipv4.ip_local_port_range=9000 65000
    kernel.sem=250 32000 100 128
    kernel.shmmax=536870912
    (Save the file)
    Note: kernel.shmmax = max possible value, e.g. size of physical RAM.
    Verify: sudo cat /etc/sysctl.d/60-oracle.conf
    Load new kernel parameters:
    sudo service procps start
    Verify:
    sudo sysctl -q fs.file-max
    -> fs.file-max = 6815744h4. A.5. Oracle Installation Directory
    The current Oracle Installation Guide uses the same directory like in previous versions: /usr/lib/oracle/xe/app/oracle/product/11.2.0/server. However, the current Beta installation uses Oracle Flexible Architecture (OFA) and installs into /u01/app/oracle/product/11.2.0/xe. Due to size limitations of Oracle XE it may not be necessary to store the installation to a specific directory or separate volume, but it is possible:
    Install Oracle XE to separate disk volume:
    From the system console menu: System > Administration > Disk Utility
    Select "ext3" filesystem for Oracle compatibility and specify a Volume label, e.g. Oracle.
    Notice the device name e.g. /dev/sdb
    Get the drive UUID:
    sudo blkid
    e.g. /dev/sdb: UUID="d19a2d8f-da43-4802-8bdb-0703c855e23a"
    Modify /etc/fstab to automatically mount the volume at system startup:
    sudo cp /etc/fstab /etc/fstab.original
    sudo nano /etc/fstab
    (Add the following, using determined UUID, for exmple)
    UUID=d19a2d8f-da43-4802-8bdb-0703c855e23a /u01 ext3 defaults,errors=remount-ro 0 1
    (Save the file)
    Create the mount-point, mount the new volume and set ownership and privileges:
    sudo mkdir /u01
    sudo mount -a
    sudo chown root:root /u01
    sudo chmod 755 /u01
    Verify:
    df -h
    or restart the systemYou can also install Oracle XE into a specific directory:
    Create a symbolic link to store the installation into an existing directory, for instance:
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    Edited by: 1000595 on 04:58 17-04-2013

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    This question is not related to the Database Migration Assistant for Unicode (DMU). Please, post your question to one of the more appropriate forums, for example:
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    This question is not related to the Database Migration Assistant for Unicode (DMU). Please, post your question to one of the more appropriate forums, for example:
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