MYSQLDUMPSLOW

mysqldumpslow − Summarize slow query log files

mysqldumpslow [options] [log_file ...]

The MySQL slow query log contains information about queries that take a long time to execute (see Section 5.2.5, “The Slow Query Log”). mysqldumpslow parses MySQL slow query log files and prints a summary of their contents.

Normally, mysqldumpslow groups queries that are similar except for the particular values of number and string data values. It “abstracts” these values to N and 'S' when displaying summary output. The −a and −n options can be used to modify value abstracting behavior.

Invoke mysqldumpslow like this:

shell> mysqldumpslow [options] [log_file ...]

mysqldumpslow supports the following options.

• −−help

Display a help message and exit.

• −a

Do not abstract all numbers to N and strings to 'S'.

• −−debug, −d

Run in debug mode.

• −g pattern

Consider only queries that match the (grep−style) pattern.

• −h host_name

Host name of MySQL server for *−slow.log file name. The value can contain a wildcard. The default is * (match all).

• −i name

Name of server instance (if using mysql.server startup script).

• −l

Do not subtract lock time from total time.

• −n N

Abstract numbers with at least N digits within names.

• −r

Reverse the sort order.

• −s sort_type

How to sort the output. The value of sort_type should be chosen from the following list:

• t, at: Sort by query time or average query time

• l, al: Sort by lock time or average lock time

• r, ar: Sort by rows sent or average rows sent

• c: Sort by count

By default, mysqldumpslow sorts by average query time (equivalent to −s at).

• −t N

Display only the first N queries in the output.

• −−verbose, −v

Verbose mode. Print more information about what the program does.

Example of usage:

shell> mysqldumpslow
Reading mysql slow query log from /usr/local/mysql/data/mysqld51−apple−slow.log
Count: 1  Time=4.32s (4s)  Lock=0.00s (0s)  Rows=0.0 (0), root[root]@localhost
 insert into t2 select * from t1
Count: 3  Time=2.53s (7s)  Lock=0.00s (0s)  Rows=0.0 (0), root[root]@localhost
 insert into t2 select * from t1 limit N
Count: 3  Time=2.13s (6s)  Lock=0.00s (0s)  Rows=0.0 (0), root[root]@localhost
 insert into t1 select * from t1

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For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.

Oracle Corporation (http://dev.mysql.com/).