MYSQLDUMPSLOW(1) MySQL Database System MYSQLDUMPSLOW(1)
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.
Display a help message and exit.
Do not abstract all numbers to N and strings to 'S'.
o --debug, -d
Run in debug mode.
o -g pattern
Consider only queries that match the (grep-style) pattern.
o -h host_name
Host name of MySQL server for *-slow.log file name. The value can contain a wildcard.
The default is * (match all).
o -i name
Name of server instance (if using mysql.server startup script).
Do not subtract lock time from total time.
o -n N
Abstract numbers with at least N digits within names.
Reverse the sort order.
o -s sort_type
How to sort the output. The value of sort_type should be chosen from the following
o t, at: Sort by query time or average query time
o l, al: Sort by lock time or average lock time
o r, ar: Sort by rows sent or average rows sent
o c: Sort by count
By default, mysqldumpslow sorts by average query time (equivalent to -s at).
o -t N
Display only the first N queries in the output.
o --verbose, -v
Verbose mode. Print more information about what the program does.
Example of usage:
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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This documentation is free software; you can redistribute it and/or modify it only under
the terms of the GNU General Public License as published by the Free Software Foundation;
version 2 of the License.
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY
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PURPOSE. See the GNU General Public License for more details.
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if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
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/).
MySQL 5.5 01/30/2014 MYSQLDUMPSLOW(1)