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Useful OEM Queries to get Target details from OEM Repository

List Targets with TNS Listener ports configured : SELECT mgmt$target.host_name , mgmt$target.target_name , mgmt$target.target_type , mgmt$target_properties.property_name , mgmt$target_properties.property_value FROM mgmt$target , mgmt$target_properties WHERE ( mgmt$target.target_name = mgmt$target_properties.target_name ) AND ( mgmt$target.target_type = mgmt$target_properties.target_type ) and ( mgmt$target.target_type = 'oracle_listener' ) and ( mgmt$target_properties.property_name = 'Port' ); Devora02       LISTENER_ora02                       oracle_listener Port 1529 Devora01       LISTENER_ora01                       oracle_listener Port 1529 Devora04       LISTENER_ora04                       oracle_listener Port 1529 List Machine_Names, CPU Count & Database Verion for Licensing SELECT mgmt$target.host_name , mgmt$target_properties.property_name , mgmt$target_properties.property_value FROM mgmt$target , mgmt$target_properties WHERE ( mgmt$
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WARNING: Subscription for node down event still pending' in Listener Log

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These messages are related to the Oracle TNS Listener's default subscription to the Oracle Notification Service (ONS). In a non-RAC environment it is recommended to disable this subscription.   This feature was introduced in Oracle 10g. SOLUTION Set the following parameter in the listener.ora: SUBSCRIBE_FOR_NODE_DOWN_EVENT_<listener_name>=OFF Where <listener_name> should be replaced with the actual listener name configured in the LISTENER.ORA file. SUBSCRIBE_FOR_NODE_DOWN_EVENT_<listener_name> parameter is to be placed by itself on an empty line. It will be necessary to restart or reload the listener following the addition of this parameter. This will prevent the messages from being written to the log file and may also prevent the TNS Listener from hanging periodically.  See (10g only) NOTE 340091.1 Intermittent TNS Listener Hang, New Child Listener Process Forked Please Note: Setting SUBSCRIBE_FOR_NODE_DOWN_<listener_n
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ORA-65139: Mismatch between XML metadata file and data file

Error: CDB$ROOT@EBTUPRDC> CREATE PLUGGABLE DATABASE EBTUSPRDPDB1 using '/home/oracle/EBTUSPRDC.xml' nocopy tempfile reuse; CREATE PLUGGABLE DATABASE EBTUSPRDPDB1 using '/home/oracle/EBTUSPRDC.xml' nocopy tempfile reuse * ERROR at line 1: ORA-65139: Mismatch between XML metadata file and data file /u05/odb/ORADATA_1/EBTUSPRDC/datafile/system.1531.807800993 for value of fcpsb (2230502002 in the plug XML file, 2230505492 in the data file) Fix: Don't open Non-CDB database until we complete pdb creation other wise we will get above error. Shutdown immediate; startup mount; alter database open read only; create xml file. shutdown immediate; Connect to CDB and Create Pluggable database .
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