单项选择题Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?()

A.Mysqlaccess
B.Mysqldump
C.Mysqlshow
D.Mysqlslow
E.Mysqldumpslow


您可能感兴趣的试卷

你可能感兴趣的试题

2.单项选择题

You have enabled the Slow Query Log for a short period. When you process the Slow Query Log, you receive the following snip of output:
Count: 100 Time=0 .22a (22s) Lock=0.00s (0s) Rows=0.0 (0),
root[root] @localhost CREATE TABLE 't1' (id serial,id0 varchar(N) unique key,intcaoll INT (N) ,intco12 INT(N) ,intco13 INT(N) ,intco14 INT(N) ,intco15 INT(N) ,charcol1 VARVHAR(N) ,charcol2 VARCHAR(N) charcol3 VARCHAR (N) ,charcol4 VARVHAR(N) ,charcol5 VARCHAR(N) charcol6 VARCHAR (N) ,charcol7 VARVHAR(N) ,charcol8 VARCHAR(N) charcol9 VARCHAR (N) .charcol 10 VACHAR (N) )
Count: 64000 Time-0.02s (1213s) Lock=0.00s (6s) Rows=1.0 (64000),
root [root]@ localhost SELECT intocl1, intco12, intco13, intco14, intco15, intco16,intco17, intco18 ,intcol9, intcol10, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6 ,charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's' Count: 1 Time=0.02s (0s) Lock=0.00s (0s) Rows=1.0 (1)
agent [agent] @localhost SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv FROM mysql.user WHERE CONCAT (user, 's', host) = CURRENT_USER () Count: 48000 Time=0.02s (778s) Lock=0.00 (3s) Rows=1.0 (48000),
root[root]@localhost SELECT intocl1,intcol2,intcol3, intcol4, intcol5, charcol1, charcol2, charcol3 ,charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's'
You want to tune the query such that it provides the greatest overall time savings. Which query will accomplish this?()

A.CHEATE TABLE 't1' (id serial, id0 varchar (N) unique key, intcol1 INT (N) ,intcol2 INT (N), intcol3 INT(N) ,intcol4 INT(N), intcol5 INT(N), charool1 VARCHAR (N) ,charcol2 VARCHAR (N), charcol3 VARCHAR(N), charcol4 VARCHAR(N), charcol5 VARCHAR (N) ,charcol6 VARCHAR (N), charcol7 VARCHAR(N), charcol8 VARCHAR(N), charcol9 VARCHAR (N) ,charcol10 VARCHAR (N)
B.SELECT intcol1, intcol2, intcol3, intcol4, intcol5, intcol6, intcol7, intcol8, intcol9, Intcol10, intcol11, intcol12, intcol13, intcol14, intcol15, intcol16, intcol17, intcol18, intcol19, charcol10 FROM t1 WHERE id = 's'
C.SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv FROM mysql.user WHERE CONCAT (user,'s', host) = CURRENT_USER()
D.SELECT intcol1, intcol2, intcol3, intcol4, intcol5, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's'

3.单项选择题Which statement is true about using Microsoft Windows Cluster as a platform for Mysql?()

A.It implements High Availability by using the .NET Connector's' load balancing capabilities
B.It is shared-nothing architecture
C.It is provided by means of IP- level disk replication
D.It relies on the shared disk architecture being visible to both servers

4.多项选择题Which two requirements would lead towards a high availability solution?()

A.When uptime is critical
B.When data must be refactored
C.When application concurrency is static
D.When data loss is unacceptable
E.When application is a single point of failure

5.单项选择题

You have forgotten the root user account password. You decide to reset the password and execute the following:
Shell> /etc/init.d/mysql stop
Shell> /etc/init.d/mysql start – skip-grant tables
Which additional argument makes this operation safer?()

A.–skip-networking, to prohibit access from remote locations
B.–reset-grant-tables, to start the server with only the mysql database accessible
C.–read-only,to set all data to read-only except for super users
D.–old-passwords, to start Mysql to use the old password format while running without the grant tables

6.单项选择题An existing master-slave setup is currently using a delayed replication of one hour. The master has crashed and the slave must be "rolled forward" to provide all the latest data. The SHOW SLAVE STATUS indicates the following values: RELAY_LOG_FILE =hostname-relay-bin.00004 RELAY_LOG_POS = 1383 Which command set would make the slave current?()

A.Gtid_mode must be set to AUTO during point in time recoveries
B.Mysqlbinlog ignores arguments to – exclude-gtids-it means ignore all events with GTIDs
C.The server keeps track of which GTIDs have already been executed and skips those
D.Enforce_gtid_consistency is set to ON

7.单项选择题

An existing master-slave setup is currently using a delayed replication of one hour. The master has crashed and the slave must be "rolled forward" to provide all the latest data. The SHOW SLAVE STATUS indicates the following values: RELAY_LOG_FILE =hostname-relay-bin.00004 RELAY_LOG_POS = 1383
Which command set would make the slave current?()

A.STOP SLAVE; CHANGE MASTER TO MASTER_DELAY =0, RELAY_LOG_FILE = 'hostnamerelay- bin.00004' , RELAY_LOG_POS= 1383
B.STOP SLAVE; CHANGE MASTER TO RELAY_LOG_FILE = 'hostname-relay-bin.00004', RELAY_LOG_POS = 1383
C.STOP SLAVE; CHANGE MASTER TO MASTER_DELAY=0; START SLAVE
D.STOP SLAVE; SET GLOBAL master_delay =0; START SLAVE

8.多项选择题What are three methods to reduce Mysql server exposure to remote connections?()

A.Setting — skip-networking when remote connections are not required
B.Using the sql_mode=STRICT_SECURE after connections are established for encrypted communications
C.Setting specific GRANT privilege to limit remote authentication
D.Setting – mysql_secure_configuration to enable paranoid mode
E.Using SSL when transporting data over remote networks

9.单项选择题Following a server crash, the automatic recovery of InnoDB fails. How would you begin to manually repair the InnoDB tables?()

A.Start the server with the – innodb_recover_options option set to FORCE
B.Start the server with the – innodb_force_recovery option set to a non-zero value
C.Start the server as usual, and then execute the REPAIR TABLE command
D.Start the server as usual, and then execute the CHECK TABLE command

10.多项选择题Which three statements describe how the strict SQL mode provides added security?()

A.It rejects statements that try to insert out-of-range values
B.It rejects invalid dates
C.It limits the operations that the server can perform
D.It rejects queries that produce out-of-range values
E.It rejects dates with zero day or month values

最新试题

Which two options describe how MySQL Server allocates memory?()

题型:多项选择题

You have taken a Logical Volume Manager (LVM) snapshot backup of a volume that contains the MySQL data directory. Why is it important to remove snapshots after completing a RAW backup in this way?()

题型:单项选择题

Compare a typical Distributed Replicated Block Device (DRBD) with MySQL Standard Replication using master-slave replication. Which two statements are correct?()

题型:多项选择题

Which two statements are true about setting the per-thread buffers higher than required?()

题型:多项选择题

You have table 'apps','userdata' on server that uses MyISAM storage engine.You want to transfer this data to server but use InnoDB engine instead. You execute the following commands: ServerB commands:Shell> mysqldump –u root –h server –no-data apps userdata mysql –u root –p appsShell> mysql –u root –p –h server –e 'ALTER TABLE 'apps','userdata' ENGINE=InnoDB;'Shell> mysqldump –u root –p –h server –no-create-info –order-by-primary apps userdata mysql –u root –p appsWhat effect does the – order-by-primary argument have on the mysqldump command?()

题型:单项选择题

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?()

题型:多项选择题

Which two capabilities are granted with the SUPER privilege?()

题型:多项选择题

A user executes the statement;PURGE BINARY LOGS TO 'mysql-bin.010';What is the result?()

题型:单项选择题

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?()

题型:多项选择题

What are three facts about backups with mysqldump?()

题型:多项选择题