DBA: February 2012

Oracle Enterprise Manager Grid Control (EMGC) is a system management software that delivers centralized monitoring, administration, and life cycle management functionality for the complete IT infrastructure, including systems running Oracle and non-Oracle technologies, from a single console.

Before releases 11g, all software necessary for the GC installation was packaged into a single installation. The 11g GC's significant difference from an earlier version is the introduction of Web logic Server. Web logic Server replaces OC4J which was used prior to 11gR1. So before installing Grid Control 11gR1, you must first prepare the Weblogic Server (its prerequisite jdk for 64bit platforms) and repository database.

Repository database version needs to be any one of the following versions:

10.2.0.4.0
11.1.0.7.0
11.2.0.1.0
11.2.0.2.0

Oracle official documents about EMGC 11g:

Oracle® Enterprise Manager Concepts 11g Release 11.1.0.1 (E11982)

Oracle® Enterprise Manager Grid Control Basic Installation Guide 11g Release 1 (11.1.0.1.0) (E15838)

Oracle® Enterprise Manager Grid Control Advanced Installation and Configuration Guide 11g Release 1 (11.1.0.1.0) (E16847)

Oracle Useful Metalink Notes about EMGC 11g:

Master Note for Grid Control 11.1.0.1.0 Installation and Upgrade [ID 1067438.1]

Complete Steps to Install 11.1.0.1 OMS Using 11.2 Database on 64 Bit RedHat 5 or OEL5 [ID 1130958.1]

Some useful sites about the EMGC 11g installation:

How to Build a Grid Control Environment (11g) (Step by step documentation from oracle-wiki, it is based on Oracle Linux 5)

OEM Grid Control 11g(11.1.0.1.0) Installation (A popular Step by step documentation from learnwithme11g - SRIKRISHNA MURTHY, very good note about the installation)

How to Install Oracle Grid Control 11g (Step by Step Guide) - Gokhan Atil Oracle Blog

Installing Oracle Enterprise Manager Grid Control 11gR1 on Linux (by Eric Jenkinson)

OEM Grid Control 11gR1 Installation on Oracle Linux 5.5 (64-bit) (Step by step documentation from oracle-base, based on Oracle Linux 5.5, including OS, Java, Database, Weblogic and GC installations)