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Don Burleson Blog 







audit_file_dest adump tips 

Oracle Database Tips by Donald BurlesonFebruary 14, 2015

Question:  What is the purpose of the adump directory and how is it used with Oracle auditing?

Answer:  The audit records go to the filesystem (in UNIX) or Event Log (in Windows), not to the database tables, even if the parameter audit_trail is set to DB

  • Only the users who connected as SYSDBA, SYSOPER are audited.

  • A user who has the SYSDBA privilege, but connects normally, is not audited in this setup. For the auditing to be triggered, the user has to connect as SYSDBA.

  • The user SYS is audited. In Oracle 9i, the user SYS can connect only as SYSDBA; so there is no possibility of user SYS connecting normally.

The location in UNIX is the filesystem specified by the initialization parameter audit_file_dest, which defaults to $ORACLE_HOME/rdbms/audit.

The default value is: ORACLE_BASE / admin/ ORACLE_SID/adump.  This create files with the name xxx.aud to audit operations. 

If you set audit_sys_operations=true. there is a separate file for every session that connects as SYSDBA.

SQL> show parameter audit

NAME                   TYPE          VALUE
----------------------- ----------- --------------
audit_file_dest          string      /u01/app/oracle/admin/mysid/audit
audit_sys_operations     boolean     TRUE
audit_trail              string      DB

 Also see my notes on dba_audit_trail.

There are other ways to perform DDL auditing with DDL triggers.

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