Mixed mode auditing provides the several capabilities.
These capabilities are as follows:
It enables the use of all existing auditing initialization parameters: AUDIT_TRAIL, AUDIT_FILE_DEST, AUDIT_SYS_OPERATIONS, and AUDIT_SYSLOG_LEVEL.
It writes mandatory audit records only to the traditional audit trails.
It bases standard audit records on the standard audit configuration, and writes these records to the audit trail designated by the AUDIT_TRAIL initialization parameter.
However, be aware that standard audit trail records are also generated based on unified audit policies and only these audit records are written to the unified audit trail. The standard audit records generated as a result of unified audit policies follow the semantics of unified audit policy enablement.
Administrative user sessions generate SYS audit records. These records are written if the AUDIT_SYS_OPERATIONS initialization parameter is set to TRUE. This process writes the records only to the traditional audit trails. However, when unified audit policies are enabled for administrative users, these unified audit records are also written to unified audit trail.
The format of the audit records that are written to traditional audit trails remains the same as in Oracle Database 11g Release 2.
By default, Oracle Database writes unified audit records to system global area (SGA) queues. In other words, it writes the records periodically, not immediately. You can control how often the audit records are written. See Writing the Unified Audit Trail Records to the AUDSYS Schema for more information.
The performance cost of writing an audit record is equivalent to the sum of the times required for generating and writing an audit record to the traditional audit trail and the unified audit trail.
Mixed mode auditing provides a glance of the unified audit mode features. Oracle recommends that you migrate to unified audit mode once you are comfortable with the new style of audit policies and audit trail. To migrate to unified auditing, see Oracle Database Upgrade Guide.
Who Can Perform Auditing?
