You can use Event Filters to improve scalability, remove unwanted events from the audit data stream, and increase the granularity of your audit settings. Event Filters let you filter raw audit data from the collected trace files before processing begins. Use Event Filters to improve scalability and remove unwanted events from the audit data stream. 

Event Filters allow you to further customize your audit data collection. For example, you can configure Event Filters to accommodate the following auditing needs:

• Exclude "noise" events and events generated from expected business activity, such as INSERTS and DELETES performed on a Sales database by a standard application
• Provide more precise data about specific database activity, such as collecting DDL and DML events for one table but only collecting DDL events for another table