Beginning Oracle Database 11g Administration From Novice to Professional

CHAPTER 10 MONITORING 219
Summary
Here is a short summary of the concepts touched upon in this chapter:
and capacity are some of the areas that should be monitored by the database
administrator.
alert log contains error messages and informational messages. The location
of the alert log is listed in the view. The name of the alert log will be
, where is the name of your database instance.
problems are detected.
Oracle auditing facilities. For example, the and
commands enable auditing of changes to tables.
command causes all connections and disconnections to
be recorded.
RMAN commands such as , , and
can be used to review backups. Enterprise Manager can also be used to review
backups.
; table size can be monitored
using .
base
workload, performance, and capacity. STATSPACK and AWR create regular
snapshots of these numbers—this time- series data can be manipulated with SQL
queries and turned into graphs. The view keeps track of hundreds of
different aspects of the database workload, such as logons, executions, commits,
logical reads, physical reads, redo size, and so on. The view records
execution statistics such as executions, CPU time, elapsed time, logical reads, and
physical reads for each SQL statement cached in the library cache. The
view offers cumulative values of operating system metrics such as CPU usage.