OEM 12c, Advanced Installation

Just finished an advanced install of OEM 12c (Bundle Patch 1) 12.1.0.1 and it's been much easier than I expected.

For those of you planning to install OEM12c, there's new Bundle patch version (12.1.0.1) available on otn download page which is the newest patchset available after the October 2011 product release.

*This post was first written in Dec, 2012 however the new OEM12c Release 2 is already out in Feb, 2013 and if you're planning to install or upgrade now, it's recommended to go to the newest release ...
"Oracle Enterprise Manager Cloud Control 12c Release 2 Plug-in Update 1 (12.1.0.2) New!"

Here's a quick summary of the installation steps that I've followed.

• Install Oracle Database Server 11.2.0.3(with PSU January 2012)
• Create a database for EM repository
• Download the OEM 12c (12.1.0.1) software enterprise-manager/downloads and unpack into a temporary folder
• After the usual 'support credentials' and 'search for updates' section, the installer will prompt you to choose the type of installation 'Simple or Advanced'.
• Once you select 'Advanced' and provide the 'middleware home' location say '/u01/app/middleware', it moves into "select plug-in's" section
• In this section by default, 'Oracle Database, Oracle Fusion Middleware, Oracle Exadata, Oracle MOS(My Oracle Support) are selected.
• Next section is the Weblogic Configuration where you set a password for weblogic admin user and Node Manager accounts and also provide the OMS Instance Base location which is '/u01/app/middleware/gc_inst'
• Next Section is the Database details, usual Host, Service, port and sys password for repository setup
• After this point, the installer will perform will perform a few db configuration checks and might ask you to disable the 'automatic statistics collection job' and also increase the open cursors etc.
• Next section will ask you choose the 'sysman' and agent registration passwords and also the tablespace/datafile details in the repository database.
• The final screen is the port configuration section where  you can go with the default ports or modify as per  your standards.

The important one's here are the EM upload http and https ssl   ports which are             usually 4889     and 1159 and also the Management agent port 3872.

Once you review the summary page and continue, the install will begin and after the usual root.sh, the OEM 12c installation finished within an hour and OEM 12c is ready for monitoring the managed targets.