Sunday, April 7, 2013

All Database information



LOCKS:


Oracle has several views for showing lock status, some of which show the username:
  • DBA_BLOCKERS – Shows non-waiting sessions holding locks being waited-on
  • DBA_DDL_LOCKS – Shows all DDL locks held or being requested
  • DBA_DML_LOCKS  - Shows all DML locks held or being requested
  • DBA_LOCK_INTERNAL – Displays 1 row for every lock or latch held or being requested with the username of who is holding the lock 
  • DBA_LOCKS  - Shows all locks or latches held or being requested
  • DBA_WAITERS  - Shows all sessions waiting on, but not holding waited for locks
The DBA_LOCK_INTERNAL view is best to show locks for a specific user, and you can specify the query in the form:

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