Beginning Oracle Database 11g Administration From Novice to Professional

CHAPTER 10 MONITORING 205
Listing 10-4. Monitoring the History of Modifications to Tables and Other Objects
I will have more to say on the subject of auditing in Chapter 14 and, in particular, on
the location and sizing of the audit trail.
Monitoring Security
The database administrator can use the Oracle auditing facilities to monitor database
usage. The command causes all connections and disconnections
to be recorded. Of particular interest for security purposes are the , ,
and values in the view. These tell us where a connection
originated; unusual values might indicate unauthorized intrusions. For example,
when I checked the database on my laptop, I found what appeared to be connections that
originated from another computer called 13. This alarmed me and I checked
the and values in ; fortunately, they predated the
creation of the database, which meant that the mysterious audit records were in the database
template used by Database Configuration Assistant (DBCA) when the database was
created. The results of my investigation can be seen in Listing 10-5.
Listing 10-5. Monitoring the History of Connections and Disconnections