Is it possible to change the database instance host ??!!

Hello,
Quick question, I finished the installation of XI 3.0 with all patches.  But the system is running low, very low on resources even though it has 2GB of RAM.  I was wondering if it is possible to migrate the <SAPID> database and then re-configure the central instance and J2EE Engine to access a different machine OR do I have to re-install and follow the distributed system installation process.
Thanks!

Diego--
Your issue isn't the database, it's the J2EE server.  Moving the database instance isn't going to save you enough RAM -- you'll run into the same problem again as soon as you start running messages through the system, when the J2EE engine starts allocating heap space for those messages.
Our experience has been that 2GB of RAM is not enough for a development/prototype XI system.  You need 3GB to do a basic prototype/development machine install (but ask for 4GB if this is your permanent development system).  You'll need more than that in a typical production system.
--Dan King
Capgemini

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    Listener working but not working for Enterprise manager oracle 11gr2 Linux.
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    Edited by: Neill_R on Nov 27, 2012 11:51 AM

    This was solved by : Osama_mustafa
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    emca -deconfig dbcontrol db -repos drop
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    Dear all,
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    Hello there,
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    Hi
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    2010-02-22 17:09:56,000 [HttpRequestHandler-22569956] WARN jdbc.ConnectionCache _getConnection.303 - Got a fatal exeption when getting a connection; Error code = 17002; Cleaning up cache and retrying
    2010-02-22 17:09:56,000 [HttpRequestHandler-22569956] WARN jdbc.ConnectionCache _getConnection.306 - Io exception: The Network Adapter could not establish the connection
    java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
    2010-02-22 17:09:57,000 [HttpRequestHandler-22569956] ERROR conn.ConnectionService verifyRepositoryEx.433 - Invalid Connection Pool. ERROR = Io exception: The Network Adapter could not establish the connection
    2010-02-22 17:09:57,000 [EMUI_17_09_57_/console/aboutApplication] ERROR em.console doGet.311 - java.lang.IllegalStateException: Response has already been committed
    java.lang.IllegalStateException: Response has already been committed
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    Thanks in advance.
    Jose

    You need to do some troubleshooting to find exact issue...
    Here are some metalink notes,
    How to Verify Agent Connectivity to 'OMS and Repository' Target using emrepresp.pl [ID 472292.1]
    --Database Status Shows Down Getting Error "Failed to Connect to Database Instance: ORA-12541: TNS:no listener " [ID 402227.1]
    --Error While Configuring the Database from the Grid Control Console [ID 750621.1]
    Hope this helps,
    http://www.oracleracexpert.com/
    Oracle RAC Load balancing and failover
    http://www.oracleracexpert.com/2010/01/oracle-rac-load-balancing-and-failover.html
    Download Oracle Grid Control and ASMLib and Install
    http://www.oracleracexpert.com/2009/08/download-oracle-grid-control-and-asmlib.html

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