mysqldumpslow [options] [log_file ...]
The MySQL slow query log contains information about queries that take a
long time to execute (see Section 5.4.5, "The Slow Query Log").
mysqldumpslow parses MySQL slow query log files and summarizes their
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. To modify
value abstracting behavior, use the -a and -n options.
Invoke mysqldumpslow like this:
shell> mysqldumpslow [options] [log_file ...]
Example of usage:
Reading mysql slow query log from /usr/local/mysql/data/mysqld57-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
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).
o -s sort_type
How to sort the output. The value of sort_type should be chosen
from the following list:
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.
Copyright (C) 1997, 2019, Oracle and/or its affiliates. All rights
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 WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with the program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see
For more information, please refer to the MySQL Reference Manual, which
may already be installed locally and which is also available online at
Oracle Corporation (http://dev.mysql.com/).
MySQL 5.7 04/12/2019 MYSQLDUMPSLOW(1)
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