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NEW QUESTION: 1
Identify the activities performed as part of the Automatic SQL Tuning process in the maintenance window? (Choose all that apply.)
A. generating a list of candidate SQLs for tuning
B. adding tuned SQL plans into the SQL plan baseline
C. testing and accepting the SQL profile
D. generating baselines that include candidate SQLs for tuning
E. tuning each SQL statement in the order of importance
F. generating the SQL profile
Answer: A,C,E,F
Explanation:
17.2.1 How Automatic SQL Tuning Works (link)
Oracle Database automatically runs SQL Tuning Advisor on selected high-load SQL statements
from the Automatic Workload Repository (AWR) that qualify as tuning candidates. This task, called
Automatic SQL Tuning, runs in the default maintenance windows on a nightly basis. By default,
automatic SQL tuning runs for at most one hour. You can customize attributes of the maintenance
windows, including start and end time, frequency, and days of the week.
After automatic SQL tuning begins, the database performs the following steps:
1.Identifies SQL candidates in the AWR for tuning
Oracle Database analyzes statistics in AWR and generates a list of potential SQL statements that
are eligible for tuning. These statements include repeating high-load statements that have a
significant impact on the database.
The database tunes only SQL statements that have an execution plan with a high potential for
improvement. The database ignores recursive SQL and statements that have been tuned recently
(in the last month), parallel queries, DML, DDL, and SQL statements with performance problems
caused by concurrency issues.The database orders the SQL statements that are selected as
candidates based on their performance impact. The database calculates the impact by summing the CPU time and the I/O times in AWR for the selected statement in the past week.
2.Tunes each SQL statement individually by calling SQL Tuning Advisor During the tuning process, the database considers and reports all recommendation types, but it can implement only SQL profiles automatically.
3.Tests SQL profiles by executing the SQL statement If a SQL profile is recommended, the database tests the new profile by executing the SQL statement both with and without the profile. If the performance improvement improves at least threefold, then the database accepts the SQL profile, but only if the ACCEPT_SQL_PROFILES task parameter is set to TRUE. Otherwise, the automatic SQL tuning reports merely report the recommendation to create a SQL profile.
4.Optionally, implements the SQL profiles provided they meet the criteria of threefold performance improvement The database considers other factors when deciding whether to implement the SQL profile. For example, the database does not implement a profile when the objects referenced in the statement have stale optimizer statistics. SQL profiles that have been implemented automatically show type is AUTO in the DBA_SQL_PROFILES view. If the database uses SQL plan management, and if a SQL plan baseline exists for the SQL statement, then the database adds a new plan baseline when creating the SQL profile. As a result, the optimizer uses the new plan immediately after profile creation. See Chapter 15, "Using SQL Plan Management". At any time during or after the automatic SQL tuning process, you can view the results using the automatic SQL tuning report. This report describes in detail all the SQL statements that were analyzed, the recommendations generated, and the SQL profiles that were automatically implemented.
NEW QUESTION: 2
If a user of a SIPendpoint registered to an Expressway configure with only the cisco.com domain physically dials "6501", which alias is presented in the SIP INVITE message?
A. 0
B. [email protected]
C. 6501@<ip address of the endpoint>
D. 6501@<ip address of the Expressway>
Answer: D
NEW QUESTION: 3
A. REJECT
B. ACCEPT
C. CHALLENGE
D. UPDATE PASSWORD
E. CONFIRM
Answer: A,B,C