\FBMYSQLDUMPSLOW\FR

Section: MariaDB Database System (1)
Updated: 27 June 2019
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NAME

mysqldumpslow - Summarize slow query log files

SYNOPSIS

mysqldumpslow [options] [log_file ...]

DESCRIPTION

The MariaDB slow query log contains information about queries that take a long time to execute. mysqldumpslow parses MariaDB 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 MariaDB 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, aa: Sort by rows affected or average rows affected

: • l, ae: Sort by rows examined or aggregate rows examined

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

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

: • s, as: Sort by rows sent or average rows sent

: • c: Sort by count

: • -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

COPYRIGHT

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 02110-1335 USA or see http://www.gnu.org/licenses/.

AUTHOR

MariaDB Foundation (http://www.mariadb.org/).