How many Oracle Homes are there in Oracle Applications and what is the importance of each one of them?

Oracle Applications have three Oracle Homes

  1)[oracle1@apps ~]$ cd $ORACLE_HOME

     [oracle1@apps 11.1.0]$ pwd

     /home/u03/d01/db/tech_st/11.1.0

    Database Oracle Home in the database tier that acts as the Oracle Home for the Oracle database.

 

  2)[applmgr1@apps ~]$ cd $ORACLE_HOME

     [applmgr1@apps 10.1.2]$ pwd

     /home/u01/d02/apps/tech_st/10.1.2

     It is called the technology stack Oracle Home and used by forms, reports and discoverer.

  3)[applmgr1@apps 10.1.2]$ cd $IAS_ORACLE_HOME

     [applmgr1@apps 10.1.3]$ pwd

      /home/u01/d02/apps/tech_st/10.1.3

    IAS Oracle Home, used by the Oracle HTTP Server (Web Listener).