Modern Oracle DBA

Changing passwords frequently helps ensure database security, Oracle Applications provides a command line utility, FNDCPASS, to change/reset Oracle Applications schema passwords. This utility changes the password registered in Oracle Applications tables, changes the schema password in the database and can also change user passwords. Autoconfig needs to be run after changing 'APPLSYSPUB' or 'GUEST' user password 1. Changing Apps password Syntax: 1. FNDCPASS  apps/apps 0 Y  system/manager  SYSTEM  APPLSYS WELCOME 2. FNDCPASS  apps/apps 0 Y  system/manager  ORACLE  GL      GL1 3. FNDCPASS  apps/apps 0 Y  system/manager  USER     VISION  WELCOME 4. FNDCPASS  apps/apps 0 Y  system/manager ALLORACLE    Note: The  SYSTEM  token is used when changing the APPLSYS password. The  ORACLE  token is used when changing a SINGLE Applications schema password. The  ALLORACLE  token is used when changing ALL Applications schema passwords. The  USE

What is Control File: It is small binary file It is required for database during startup operations Each database associated only one oracle database Control File Contents: DB Name and identifiers Tablespace names Names and location of data files and redo log files Check point information Redo log and archive log information Backup information Multiplexing the control file: Check the database running SPFILE (or) PFILE. My  DB is running SPFILE Multiplexing Control file DB running in SPFILE Step 1: Check the control file location Step 2: Alter the SPFILE Alter system set command is alter the spfile to including a list of control files to be used Step 3: Shutdown the database Shutdown the database in order to create additional control files on the OS level Step 4: Create additional control files using OS copy command Step 5: Start the database When the DB started spfile will be re

Oracle Database The general purpose of a database is to store and retrieve related information. Oracle database has a logical and physical structure   Physical structure   The physical structure of database it’s the set of OS in the database It’s consist of three file types Data files : Containing the actual data in database Redo log files: Click hear Record all changes made a data It’s provide a recovery mechanism Can be organized into groups At least two groups are required Control files: Click hear Defines current status of physical database At mount stage during startup It’s a binary file Memory Structure Oracle database consists of tow memory structure System Global Area (SGA): It’s allocated at instance startup and other component of an instance Program Global Area (PGA): Allocated when the server process started De allocated when process terminated Used by only one process Sys

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What is Concurrent manager? Batch Processing Sub-System Programs are run as operating system background processes. These programs may be written using a variety of Oracle tools, programming languages for executables, or OS scripts. Internal Concurrent Manager (ICM)   Controls all other concurrent managers. It administers the startup and shutdown of managers as defined by their work shift, monitors for process failure, and cleans up if a failure occurs. Standard Manager As shipped with Oracle Applications will accept and run any concurrent requests. Conflict Resolution Manager (CRM ) Enforces rules designed to ensure that incompatible concurrent requests do not run in the same conflict domain  Output Post Processor (OPP ) Concurrent Processing uses the Output Post Processor (OPP) to enforce Post Processing Output post processor run the XML publisher Concurrent Manager – Tables FND_CONCURRENT_