Database Blog

RMAN – Backup Based Clone

RMAN has the ability to duplicate, or clone, a database from a backup or from an active database. It is possible to create a duplicate database on a remote server…

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Recycle Bin in Oracle

  Oracle database has the recycle bin which is a data dictionary table and contains information about dropped objects.  Until we don’t use the purge option, all dropped tables and…

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Useful TFACTL Commands

1. Check tfactl status with version: tfactl status 2. Check tfactl tool status: tfactl toolstatus 3. Get config details: tfactl print config 4. List of user having access to tfactl:…

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PDB Lockdown Profiles In Oracle 12.2

ALTER LOCKDOWN PROFILE statement to alter a PDB lockdown profile. You can use PDB lockdown profiles in a multitenant environment to restrict user operations in pluggable databases (PDBs). Create a…

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SGA TARGET ADVISORY IN ORACLE

The V$SGA_TARGET_ADVICE view provides information that helps us in deciding optimal value for  SGA_TARGET. MMON background process gather statistics about sga_target usage and update the V$SGA_TARGET_ADVICE view. Check sga target advisory is…

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Query To Find Dependent Objects Of An Invalid Object

SELECT owner, object_type, object_name FROM dba_objects WHERE status = ‘INVALID’ AND object_name IN (SELECT referenced_name FROM dba_dependencies WHERE name = ‘<INVALID_OBJECT_NAME>’);

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Query to Check locks on a table

Select object_id, session_id, oracle_username, os_user_name, Process, locked_mode From sys.v_$locked_object; Select a.object_name, b.oracle_username From all_objects a, v$locked_object b Where a.object_id = b.object_id And a.object_name like ‘po%’;

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Support date for Oracle WebLogic Server versions

The following table provides the date each version was released and its end of Grace Period. These are dependent on a Patch Set released in order for the Grace Period…

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OID EMAGENT not started once after Daylight Savings

Once after Daylight saving happened, Some of the IAM & IDM management service was down. So we thought of bouncing the complete SSO services. While starting IDM services EMAGENT was…

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Opmnctl Process Hangs During Installation and Cloning Due to a Bug in the Opmnctl Script

Environment: Oracle Fusion Middleware - Version 10.1.3.1.0 to 10.1.3.3.0 [Release AS10gR3] Symptoms: The opmnctl process hangs and goes into a loop, executing opmnctl repeatedly and thereby increasing the number of…

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