EM DB Control Reconfigure

Reconfiguring Enterprise Manager or rebuilding EM repository is a very common issue, as far as I have seen on the OTN Forums, these are simple steps to reconfigure and/or rebuild EM repository.  The port configuration is optional and should be used only in case the port is to be changed or if there are port conflicts. 

set oracle_sid=YourInstanceName
emctl stop dbconsole
emca -deconfig dbcontrol db
emca -repos recreate
emca -config dbcontrol db
emca -reconfig ports -DBCONTROL_HTTP_PORT 80



EMCA reference

ORACLE_HOME/bin/emca [operation] [mode] [dbType] [flags] [parameters]

-h | --h | -help | --help: prints this help message
-version: prints the version

-config dbcontrol db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure Database Contro
l for a database
-config centralAgent (db | asm) [-cluster] [-silent] [parameters]: configure central agent management
-config all db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure both Database Control and central agent management

-deconfig dbcontrol db [-repos drop] [-cluster] [-silent] [parameters]: de-configure Database Control
-deconfig centralAgent (db | asm) [-cluster] [ -silent] [parameters]: de-configure central agent management
-deconfig all db [-repos drop] [-cluster] [-silent] [parameters]: de-configure both Database Control and central agent management

-addInst (db | asm) [-silent] [parameters]: configure EM for a new RAC instance
-deleteInst (db | asm) [-silent] [parameters]: de-configure EM for a specified RAC instance

-reconfig ports [-cluster] [parameters]: explicitly reassign Database Control ports
-reconfig dbcontrol -cluster [-silent] [parameters]: reconfigures RAC Database Control deployment

-displayConfig dbcontrol -cluster [-silent] [parameters]: displays information about the RAC Database Control configurat

-upgrade (db | asm | db_asm) [-cluster] [-silent] [parameters]: upgrades an earlier version of the EM configuration to the current version

-restore (db | asm | db_asm) [-cluster] [-silent] [parameters]: restores the current version of the EM configuration to an earlier version

Parameters and Options:
[parameters]: [ -respFile fileName ] [ -paramName paramValue ]*

db: perform configuration operation for a database (including databases that use ASM)
asm: perform configuration operation for an ASM-only instance
db_asm: perform upgrade/restore operation for a database and an ASM instance
-repos create: create a new Database Control repository
-repos drop: drop the current Database Control repository
-repos recreate: drop the current Database Control repository and recreate a new one
-cluster: perform configuration operation for a RAC database
-silent: perform configuration operation without prompting for parameters
-backup: configure automatic backup for a database

Parameters for single instance databases
        HOST: Database hostname
        SID: Database SID
        PORT: Listener port number
        HOST_USER: Host username for automatic backup
        HOST_USER_PWD: Host user password for automatic backup
        BACKUP_SCHEDULE: Automatic backup schedule (HH:MM)
        EMAIL_ADDRESS: Email address for notifications
        MAIL_SERVER_NAME: Outgoing Mail (SMTP) server for notifications
        ASM_SID: ASM SID
        ASM_PORT: ASM port
        ASM_USER_ROLE: ASM user role
        ASM_USER_NAME: ASM username
        ASM_USER_PWD: ASM user password
        SRC_OH: ORACLE_HOME for the database to be upgraded
        DBSNMP_PWD: Password for DBSNMP user
        SYSMAN_PWD: Password for SYSMAN user
        SYS_PWD: Password for SYS user
        DBCONTROL_HTTP_PORT: Database Control HTTP port
        AGENT_PORT: EM agent port
        RMI_PORT: RMI port for Database Control
        JMS_PORT: JMS port for Database Control

Additional Parameters for cluster databases

        CLUSTER_NAME: Cluster name
        DB_UNIQUE_NAME: Database unique name
        SERVICE_NAME: Service name
        EM_NODE: Database Control node name
        EM_SID_LIST: Agent SID list [comma separated]