QUESTION 199
Which package provides API's for the SQL Tuning Advisor?
A. DBMS_MONITOR
B. DBMS_STATS
C. DBMS_SQLTUNE
D. DBMS_ADVISOR
Answer: C
同159题：http://blog.csdn.net/rlhua/article/details/14088877
Explanation/Reference:
Section: Managing Database Performance & Tuning
Answer option C is correct.
The recommended interface for running the SQL TuningAdvisor is the Oracle Enterprise Manager.
However, if Oracle Enterprise Manager is unavailable, you can run the SQL Tuning Advisor using procedures
in the DBMS_SQLTUNE package. The DBMS_SQLTUNE package provides the following three interrelated
areas of functionality:
- SQL Tuning Advisor Subprograms
- SQL Profile Subprograms
- SQL Tuning Set Subprograms
Answer option B is incorrect. With the DBMS_STATS package you can view and modify optimizer statistics
gathered for database objects. The Oracle RDBMS allows you to collect statistics of many different kindsas an
aid to improve performance. This package is concerned with optimizer statistics only. Given that Oracle sets
automatic statistics collection of this kind by default, this package is intended for only specializedcases. The
statistics of interest to be viewed or modified canreside in the dictionary or in a table created in the user's
schema for this purpose. You can also collect and manage user-defined statistics for tables and domain
indexes using this package.
Answer option D is incorrect. DBMS_ADVISOR is part of theServer Manageability Suite of Advisors, a set of
expert systems that identifies and helps resolve performance problems relating to the various databaseserver
components.
Answer option A is incorrect. The DBMS_MONITOR package lets you use PL/SQL for controlling additional
tracing and statistics gathering.