Which of the following identifies and creates an index to minimize the DB time for a particular
SQL statement?
A.
The SGA Tuning Advisor
B.
The SQL Access Advisor
C.
The SQL Tuning Advisor
D.
The Memory Advisor
Explanation:
The SQL Access Advisor allows the DBA to gather global recommendations for a workload.
The SQL Tuning advisor is more granular, tuning a single statement.
The main functions of the SQL Access advisor is to recommend missing indexes and
materialized views, but a comprehensive task analysis will also create SQL Profiles that can
be used within the SQL Tuning advisor. The DBA defines the SQL used in the SQL Access
Advisor task, and can choose current SQL, a user-defined set of SQL, a historical workload,
or a hypothetical workload.
A hypothetical workload is very useful because the DBA need-only specify the tables that
participate in the queries, and the SQL Access Advisor gathers the appropriate SQL
statements to create the workload. The SQL Tuning Advisor (STA) is primarily designed to
replace the manual tuning of SQL statements and speed up the overall SQL tuning process.
The SQL Tuning Advisor studies poorly executing SQL statements and evaluates resource
consumption in terms of CPU, I/O, and temporary space.
The SQL Tuning Advisor (STA) works with the Automatic Tuning Optimizer (ATO) to analyze
historical SQL workload using data from the AWR, and it generates recommendations for
new indexes and materialized views that will reduce the disk I/O associated with
troublesome SQL statements.http://www.dba-oracle.com/oracle10g_tuning/t_sql_tuning_advisor.htm