Install GC Agent on host with GC repository database.

Hello,
I have a couple questions about setting up a Grid Control environment. We are doing a proof of concept for grid control. We currently have two linux servers, one for the repository database (11gR2), and one for the Grid Control/OMS(10gR5).
My question is can we install the GC Agent on the repository database server?
I would like to monitor the repository database server and the repository database itself, but is that possible?
I tried installing the agent on the repository db server and I thought it was a success, but when I run emctl agent status I get the following:
EM Configuration issue. /u01/app/oracle/product/11.2.0/phxoemdb.revenue.int_GRIDDB not found.
Should I use emca and configure the database? I'm worried it will mess with the Grid Control Repository tables.

Well, now that the post is active again, let me respond:
My question is can we install the GC Agent on the repository database server?There is already (or should be) a "Central Agent" on the OMS server. If the EM repository database is on a different server from the OMS, then you do need to install a regular agent.
I would like to monitor the repository database server and the repository database itself, but is that possible?This is definitely possible as long as there is an agent on the server, either the central agent or regular agent like on any other server.
I tried installing the agent on the repository db server and I thought it was a success, but when I run emctl agent status I get the following:If OMS is executing on the same server as the repository database, then there is already a central agent. Each component has it's own Oracle Home, maybe you are trying to execute the commands from a different home. You need to set the correct environment for each component when executing command related to that component.
:p

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    * Import without data and with constraints -
    imp constraints=y indexes=y FROMUSER=sysman TOUSER=sysman buffer=2097152 rows=n ignore=y file=fullem102_2.dmp log=fullem102imp_2.log
    Verify the log file and make sure that no characterset conversion happens (this line should not be present in log file “possible charset conversion”)
    2.3.4 Post Import EM Steps
    * Please refer to Section 3.1 for Post Migration EM Specific Steps
    3 Post Repository Migration Activities
    3.1 Post Migration EM Steps
    Following EM specific Steps should be carried out post migration -
    * Recompile all invalid objects in sysman schema using
    connect sysman/<password>
    @ORACLE_HOME/sysman/admin/emdrep/sql/core/latest/admin/admin_recompile_invalid.sql
    * Run post plugin steps to recompile any invalids, create public synonyms, create other users, enable VPD policy, repin packages-
    connect sysman/<password>
    @ORACLE_HOME/sysman/admin/emdrep/sql/core/latest/admin/admin_create_synonyms.sql
    @ORACLE_HOME/sysman/admin/emdrep/sql/core/latest/admin/admin_post_import.sql
    Provide <ORACLE_HOME/sysman/admin/emdrep/sql for em_sql_root
    SYSMAN for em_repos_user
    MGMT_TABLESPACE for em_tablespace_name
    TEMP for em_temp_tablespace_name
    Note – The users created by admin_post_import will have same passwords as username.
    Check for invalid objects – compare source and destination schemas for any discrepancy in counts and invalids.
    * Following queues are not enabled after running admin_post_import.sql as per EM bug 6439035, enable them manually by running
    connect sysman/<password>
    exec DBMS_AQADM.START_QUEUE( queue_name=> 'MGMT_TASK_Q');
    exec DBMS_AQADM.START_QUEUE( queue_name=> 'MGMT_PAF_RESPONSE_Q');
    exec DBMS_AQADM.START_QUEUE( queue_name=> 'MGMT_PAF_REQUEST_Q');
    exec DBMS_AQADM.START_QUEUE( queue_name=> 'MGMT_LOADER_Q');
    * Please check for context using following query
    connect sysman/<password>
    select * from dba_context where SCHEMA='SYSMAN';
    If any of following context is missing create them using
    connect sysman/<password>
    create or replace context storage_context sing storage_ui_util_pkg;
    create or replace context em_user_context sing setemusercontext;
    * Partition management
    Check if necessary partitions are created so that OMS does not run into problems for loading into non-existent partitions (This problem can come only if there are gap of days between export and import) –
    exec emd_maintenance.analyze_emd_schema('SYSMAN');
    This will create all necessary partitions up to date.
    * Submit EM dbms jobs
    Reset back job_queue_processes to original value and resubmit EM dbms jobs
    connect /as sysdba
    alter system set job_queue_processes=10;
    connect sysman/<password>
    @ORACLE_HOME/sysman/admin/emdrep/sql/core/latest/admin/admin_submit_dbms_jobs.sql
    * Update OMS properties and startup OMS
    Update emoms.properties to reflect the migrated repository - oracle.sysman.eml.mntr.emdRepConnectDescriptor
    Update host name, port with the correct value and start the OMS.
    * Relocate “Management Services and Repository” target
    If “Management Services and repository” target needs to be migrated to the destination host, delete the old "Management Services and Repository" target. Add it again with same name "Management Services and Repository" on agent running on new machine.
    * Run following sql to verify the repository collections are enabled for emrep target
    SELECT
    target_name,
    metric_name,
    task.task_id,
    task.interval,
    task.error_message,
    trunc((mgmt_global.sysdate_utc-next_collection_timestamp )/1440) delay
    from mgmt_collection_metric_tasks mtask,
    mgmt_collection_tasks task,
    mgmt_metrics met,
    mgmt_targets tgt
    where met.metric_guid = mtask.metric_guid AND
    tgt.target_guid = mtask.target_guid AND
    mtask.task_id = task.task_id(+) AND
    met.source_type > 0 AND
    met.source != ' '
    AND tgt.target_type='oracle_emrep'
    ORDER BY mtask.task_id;
    This query should result same records in both source and destination database. If you find any of collections missing in destination database, run following to schedule them in destination database
    DECLARE
    traw RAW(16);
    tname VARCHAR2(256);
    ttype VARCHAR2(64);
    BEGIN
    SELECT target_name, target_type, target_guid
    INTO tname, ttype, traw
    FROM mgmt_targets
    WHERE target_type = 'oracle_emrep';
    mgmt_admin_data.add_emrep_collections(tname,ttype,traw);
    END;
    * Discover/relocate Database and database Listener targets
    Delete the old repository database target and listener and rediscover the target database and listener in EM

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