A.It requires the RELOAD, FILE, and DROP privileges
B.It closes and reopens all log files
C.It closes and sends binary log files to slave servers
D.It flushes dirty pages in the buffer pool to the REDO logs
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A.There is no impact on performance
B.The overhead depends on the settings of the Performance Schema
C.There is an overhead for querying the Performance Schema but not for having it enabled
D.There is a constant overhead regardless of settings and workload
A.The attribute "STATUS" is set to the string EXTERNAL_AUTH
B.The attribute "PRIV_USER" contains the username
C.The event type that is given in the attribute "NAME" is EXTERNAL_AUTH
D.There is no differentiation between native and external authentication events
E.External authentication is managed through external auditing logs
F.The "PROXY_PRIV" user shows a username if external authentication is used
Consider the Mysql Enterprise Audit plugin. The following event detail is found in the audit log:
Which two points can be concluded from the given event?（）
A.A connection as the user kate was successful
B.A connection failed due to authentication being unsuccessful
C.A connection was attempted via socket rather than TCP
D.A connection was blocked by a firewall or a similar security mechanism
E.A connection failed because the proxy user privileges did not match the login user
A.It can support transactions
B.Table contents are not saved if the server is restarted
C.It cannot contain text or BLOB columns
D.It can support foreign keys
E.Each table is represented on disk as an.frm file
F.Each table has a corresponding.MYI and .MYD file
A.Mysql NDB Cluster
B.Mysql Replication
C.Distributed Replicated Block Device (DRBD) and Mysql
D.Windows Cluster and Mysql
E.Solaris Cluster and Mysql
Consider the query:
Mysql＞ SET @run = 15;
Mysql＞ EXPLAIN SELECT objective, stage, COUNT (stage)
FROM iteminformation
WHERE run=@run AND objective=’7.1’
GROUP BY objective,stage
ORDER BY stage;
The iteminformation table has the following indexes;
Mysql＞ SHOW INDEXES FROM iteminformation:
This query is run several times in an application with different values in the WHERE clause in a growing data set.
What is the primary improvement that can be made for this scenario?（）
A.Do not pass a user variable in the WHERE clause because it limits the ability of the optimizer to use indexes
B.Add an index on the objective column so that is can be used in both the WHERE and GROUP BY operations
C.Drop the run_2 index because it has caused a conflict in the choice of key for this query
D.Execute the run_2 index because it has caused a conflict in the choice of key for this query
E.Add a composite index on (run,objective,stage) to allow the query to fully utilize an index
A.It prompts you to set the root user account password
B.It checks whether file permissions are appropriate within datadir
C.It asks to remove the test database, which is generated at installation time
D.It can delete any anonymous accounts
E.It verifies that all users are configuration with the longer password hash
A.Syntax when writing queries involving JOINS
B.Memory usage when working with the data
C.Character set mapping index hash size
D.Disk usage when storing data
You install a copy of Mysql 5.6.13 on a brand new Linux server by using RPM packages. The server starts successfully as verified by the following commands: $ pidof mysqld 3132
$tail – n2 /var/lib.mysql/hostname.err
2013-08-18 08:18:38 3132 [Note] /usr/sbin/mysqld:ready for connections. Version: '5.6.13-enterprise-commercial-advaced'
socket:'/tmp/mysql.sock' port; 3306 Mysql Enterprise Server – Advanced Edition (Commercial) You attempt to log in as the root user with the following command: $mysql – u root ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
Which statement is true about this scenario?（）
A.The RPM installation script sets a default password of password for new installations
B.The local root user must log in with a blank password initially: mysql –u root –p
C.New security measures mean that the mysql_secure_installation script must be run first on all new installations
D.The mysql_install_bd post-installation script used – random-password
最新试题
You are investigating the performance of the server and see the following information: Events_waits_summary_global_by_event_name in the performance schema shows that the wait/synch/mutex/sql/LOCK_table_cache event is dominating other wait events. The table_open_cache_overflows status variable is 0.Which action should be taken to remove the performance bottleneck described here?（）
You want to create a temporary table named OLD_INVENTORY in the OLD_INVENTORY database on the master server. This table is not to be replicated to the slave server.Which two changes would ensure that the temporary table does not propagate to the slave?（）
A MySQL replication slave is set up as follows: User all InnoDB tablesReceives ROW-based binary logs Has the read-only optionThe replication slave has been found in an error state.You check the MySQL error log file and find the following entries:2013-08-27 13:55:44 9056 [ERROR] Slave SQL: Could not execute Write_rows event on table test.tl; Duplicate entry ‘3’ for key’PRIMARY’ , Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event’s master log 56_master-bin.000003, end_log_pas 653, Error_code: 10622013-08-27 13:55:44 9056 [Warning] Salve: Duplicate entry ‘3’ for key ‘PRIMARY’Error_code: 10622013-08-27 13:55:44 9056 [ERROR] Error running query, slave SQL thread aborted. Fix theproblem, and restart the slave SQL thread with “SLAVE START”, We stopped at log ‘56_masterbin.000003’ position 496 What are two possible causes for this error to occur?（）
You have a server that has very limited memory but has a very large table. You will use mysqldump to back up this table.Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?（）
Which two statements describe the behavior of the server's SQL mode?（）
A user executes the statement;PURGE BINARY LOGS TO 'mysql-bin.010';What is the result?（）
You examine the output of SHOW GLOBAL STATUS and notice that the value of Created_tmp_disk_tables is consistently increasing.Which two variables would likely fix this issue?（）
What is true regarding InnoDB locking?（）
Which three tasks can be performed by using the performance Schema?（）
You need to replicate a table from a master to a slave. The master and slave copies of the table will have different number of columns.Which two conditions must be true?（）