The probes monitor all database transactions, including those of privileged users, at the operating system kernel level without relying on database audit logs.
探测器在操作系统内核级上监视所有数据库事务，包括特权用户的事务，而不依赖于数据库审计日志。
2
You usually need this level of detail for specialized purposes; such as performance measurements, transaction audit trails, or transactions that take less than a second.
对于专门的目的，通常需要这个细节级别；比如性能测量、事务审计跟踪或者小于一秒的事务。
3
As the figure shows, the audit facility operates at the instance level servicing all databases in the instance.