Create oracle database manualy 9i

I supposed that the Oracle Database Software is already installed.

1- Creat the required directories
    mkdir -p /OraData/drportal/CtlF    
    mkdir -p /OraData/drportal/DataF   
    mkdir -p /OraData/drportal/OnRdLog
    mkdir -p /oracle/OraHome9i/drportal/bdump
    mkdir -p /oracle/OraHome9i/drportal/cdump
    mkdir -p /oracle/OraHome9i/drportal/udump

2- Set the instance name:
export ORACLE_SID=DRPORTAL


3- create the init file /oracle/OraHome9i/dbs/initDRPORTAL.ora
control_files = (/OraData/drportal/CtlF/control01.ctl,
                 /OraData/drportal/CtlF/control02.ctl,
                 /OraData/drportal/CtlF/control03.ctl)
undo_management = auto
db_name         = DRPORTAL
instance_name   = DRPORTAL
db_block_size       = 8192
background_dump_dest = /oracle/OraHome9i/drportal/bdump
core_dump_dest = /oracle/OraHome9i/drportal/cdump
user_dump_dest = /oracle/OraHome9i/drportal/udump
COMPATIBLE=9.2.0
PROCESSES=150
UNDO_TABLESPACE=undotbs1


4- Start the instance

       sqlplus / as sysdba
       select  instance_name from v$instance;
       startup nomount pfile='/oracle/OraHome9i/dbs/initDRPORTAL.ora';

5- Create the database as the following:

CREATE DATABASE DRPORTAL
   USER SYS IDENTIFIED BY system12
   USER SYSTEM IDENTIFIED BY system12
   LOGFILE GROUP 1 ('/OraData/drportal/OnRdLog/redo01.log') SIZE 10M,
           GROUP 2 ('/OraData/drportal/OnRdLog/redo02.log') SIZE 10M,
           GROUP 3 ('/OraData/drportal/OnRdLog/redo03.log') SIZE 10M
   MAXLOGFILES 192
   MAXLOGMEMBERS 5
   MAXLOGHISTORY 37394
   MAXDATAFILES 500
   MAXINSTANCES 32
   CHARACTER SET WE8ISO8859P1
   DATAFILE '/OraData/drportal/DataF/system.dbf' SIZE 300M REUSE
   EXTENT MANAGEMENT LOCAL
   DEFAULT TEMPORARY TABLESPACE temp
      TEMPFILE '/OraData/drportal/DataF/temp01.dbf'
      SIZE 500M REUSE
   UNDO TABLESPACE undotbs1
      DATAFILE '/OraData/drportal/DataF/undotbs01.dbf'
      SIZE 2000M REUSE AUTOEXTEND Off ;

6- Create the spfile for this database:
    create spfile from pfile;

7- Post steps for the database creation are to run:
-- As sys  user
@$ORACLE_HOME/rdbms/admin/catalog.sql
@$ORACLE_HOME/rdbms/admin/catproc.sql

Error while running NETCA or DBCA with XMING on Unix AIX

 I got this error while I'm using the XMING to lunch DBCA and NETCA
$ netca

Oracle Net Services Configuration:
Warning: Cannot convert string "-*-lucida-medium-r-*-*-*-*-*-*-*-*-iso8859-1" to type FontStruct


java.lang.InternalError: java/langNullPointerException
        at sun.awt.motif.MComponentPeer.pSetFont(Native Method)
        at sun.awt.motif.MComponentPeer.setFont(MComponentPeer.java:308)
        at sun.awt.motif.MWindowPeer.init(MWindowPeer.java:144)
        at sun.awt.motif.MFramePeer.(MFramePeer.java:91)
        at sun.awt.motif.MToolkit.createFrame(MToolkit.java:301)
        at java.awt.Frame.addNotify(Frame.java:502)
        at java.awt.Window.pack(Window.java:470)
        at oracle.ewt.wizard.WizardDialog.runDialog(Unknown Source)
        at oracle.net.ca.NetCA.start(Unknown Source)
        at oracle.net.ca.NetCA.(Unknown Source)
        at oracle.net.ca.NetCA.main(Unknown Source)
Oracle Net Services configuration failed.  The exit code is -1

The solution is very simple. Just need to install the missing font at your PC (Not the server)

Oracle database lost Temp datafile

1- Shutdown the database if its open.
     Shutdown abort;

2- Startup the database in mount state:
    startup mount;

3- Drop the missing tempfile:
    Alter database datafile '/OraData/DBPORTAL/temp03.dbf' offline drop;

4- Open the database normally:
    alter database open;

Oracle Applications: Change IP Address

1. Change the IP Address in the Server;

2. Verify the current ip address setup in the Oracle Applications environment. Connect as apps user into SQL*Plus and run:

select NODE_NAME, STATUS, NODE_MODE, NODE_ID,SERVER_ADDRESS, HOST, DOMAIN, WEBHOST, VIRTUAL_IP

from fnd_nodes

where node_name = 'HOSTNAME';

3. Run the following command to remove the old ip address from the Oracle Applications tables:

Approach 1:
perl $AD_TOP/bin/adgentns.pl appspass=apps contextfile=$APPL_TOP/admin/_hostname.xml -removeserver

replace _hostname.xml for the context file name under the $APPL_TOP/admin directory;

then connect to SQL*Plus as apps user and run:

begin
FND_NET_SERVICES.remove_server('', '');
end;
/
commit;
/

Approach 2:
SQL> EXEC FND_CONC_CLONE.SETUP_CLEAN;
SQL> COMMIT;

4. Run autoconfig to populate the values using the new IP Address.

5. Confirm the ip address has been changed to the new value changed in the step 1:

select NODE_NAME, STATUS, NODE_MODE, NODE_ID,SERVER_ADDRESS, HOST, DOMAIN, WEBHOST, VIRTUAL_IP from fnd_nodes where node_name = 'HOSTNAME';

Oracle: Difference between locks and latches

Locks are used to protect the data or resourses from the simulteneous use of them by multiple sessions which might set them in inconsistant state… Locks are external mechanism, means user can also set locks on objects by using various oracle statements.

Latches are for the same purpose but works at internal level. Latches are used to Protect and control access to internal data structres like various SGA buffers.They are handled and maintained by oracle and we can’t access or set it.. this is the main difference