MARIADB-DUMPSLOW(1) MariaDB Database System MARIADB-DUMPSLOW(1)
NAME
mariadb-dumpslow - Summarize slow query log files (mariadb-dumpslow is
now a symlink to mariadb-dumpslow)
SYNOPSIS
mariadb-dumpslow [options] [log_file ...]
DESCRIPTION
The MariaDB slow query log contains information about queries that take
a long time to execute. mariadb-dumpslow parses MariaDB slow query log
files and prints a summary of their contents.
Normally, mariadb-dumpslow 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 mariadb-dumpslow like this:
shell> mariadb-dumpslow [options] [log_file ...]
mariadb-dumpslow 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 mariadb.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> mariadb-dumpslow
Reading mariadb 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
Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.,
2010-2025 MariaDB Foundation
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/.
SEE ALSO
For more information, please refer to the MariaDB Knowledge Base,
available online at https://mariadb.com/kb/
AUTHOR
MariaDB Foundation (http://www.mariadb.org/).
MariaDB 11.8 5 March 2025 MARIADB-DUMPSLOW(1)
Generated by dwww version 1.16 on Tue Dec 16 06:01:45 CET 2025.