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Don Burleson Blog 







Audit_trail parameter tips

Oracle Database Tips by Donald BurlesonMay 21, 2013


Question:  I want to know how the audit_trail parameter works.  Can I use the audit_trail parameter for all types of auditing, or does audit_trail work with the audit table command?

Answer:  The audit_trail parameter is used to enable system-level auditing, which is only one type of Oracle auditing used with the audit command.  The values for the audit_trail parameter can be any of these values:

• none: The value of "none" disables database auditing. So if use use AUDIT SELECT TABLE while this parameter is null then no auditing actually will do.

• os: When audit_trail=os, database auditing directs all audit records to the operating system's audit trail. The audit information will be populated in the OS file.

• db: When audit_trail=db auditing sends all audit records to the database audit trail. The audit information will be populated in SYS.AUD$ table.

• db,extended (or db_extended in 10gr2): According with db auditing which populate information in SYS.AUD$ table. In addition, populates the SQLBIND and SQLTEXT CLOB columns of the SYS.AUD$ table.

• xml: Enables database auditing and writes all audit records to XML format OS files.

• xml,extended: Enables database auditing and prints all columns of the audit trail, including SqlText and SqlBind values and writes all audit records to XML format OS files.

When the os, xml and xml and extended options are used fir audit_trail, you need to set the audit_trail_dest parameter to specify the OS file location for the audit trail.


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