Oracle Database 12c: Enterprise Manager Database Express

Oracle Database 12c says goodbye to a tool being around after the 10gR1: the Database Console.

OC4J for the 10g and weblogic for the 11g, both have had a non-negligible overhead on the systems, especially with many configured instances.

In many cases I’ve decided to switch to Grid/Cloud Control for the main reason to avoid too many db consoles, in other cases I’ve just disabled at all web management.

The new 12c brings a new tool called Database Express (indeed, very similar to its predecessors).


Where’s my emca/emctl?

The DB Express runs entirely with pl/sql code within the XDB schema. It’s XDB that leverages its features to enable a web-based console, andĀ it’s embedded by default in the database.

To enable it, it’s necessary to check that the parameterĀ dispatchers is enabled for XDB:

and then set an https port unique on the server:

If you’ve already done it but you don’t remember the port number you can get it with this query:

You can now access the web interface by using the address:

 

db_express_home

db_express

Lower footprint, less features

From one side DB Express is thin (but not always fast on my laptop…), from the other it has clearly fewer features comparing to the DB Console.

It’s not clear to me if Oracle wants to make it more powerful in future releases or if it’s a move to force everybody to use something else (SQLDeveloper or EM12c Cloud Control). However the DBA management plugin of the current release of SQL Developer is fully compatible with the 12c, including the ability to manage pluggable databases:sqldev_pluggable_db

So is the EM 12c Cloud Control, so you have plenty of choice to manage your 12c databases from graphical interfaces.

Stay tuned!

Ludovico

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Ludovico

Oracle ACE and Senior Consultant at Trivadis SA
After being DBA Team Leader in Italy for a while, Ludovico works as Senior Database Specialist on the full Oracle stack (Clusterware, RAC, ASM), MySQL (Replication, DRBD, Galera), SQLServer and PostgreSQL.

8 thoughts on “Oracle Database 12c: Enterprise Manager Database Express

  1. Hi,
    Thanks for this useful post.
    However, I cannot make my EM start-up again after a DB-restart.
    dbms_xdb_config.gethttpsport() returns a valid port, but after DB-startup it is not started.
    Do you know of an explicit command to start it up? sth. like dbms_xdb_start_em_db_express() or whatever

    Best Regards,
    Rico

  2. Hi, I can’t see sql command how to check that the parameter dispatchers is enabled for XDB? Regards Piotr

  3. Pingback: Kyle Hailey » Oracle 12c helps developers

  4. Sql Developer 4.0 compatiable with 12c and able to Manage the database but Eralier11g dbconsole able to manage the ASM.How to manage 12.1 ASM except 12cR3 cloud console.

  5. i have Problems getting access to the Enterprise Manager Database Express
    Everything works fine with your description except the access to the web interface by using the address https://server:port/em
    No Chance, i get no Response.
    Can i check anythere if the webserver is running?

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