|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
NAME | SYNOPSIS | DESCRIPTION | COPYRIGHT | SEE ALSO | AUTHOR | COLOPHON |
|
|
|
MARIADB-DUMPSLOW(1) MariaDB Database System MARIADB-DUMPSLOW(1)
mariadb-dumpslow - Summarize slow query log files (mariadb-
dumpslow is now a symlink to mariadb-dumpslow)
mariadb-dumpslow [options] [log_file ...]
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 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/.
For more information, please refer to the MariaDB Knowledge Base,
available online at https://mariadb.com/kb/
MariaDB Foundation (http://www.mariadb.org/).
This page is part of the MariaDB (MariaDB database server)
project. Information about the project can be found at
⟨http://mariadb.org/⟩. If you have a bug report for this manual
page, see ⟨https://mariadb.com/kb/en/mariadb/reporting-bugs/⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/MariaDB/server⟩ on 2025-08-11. (At that time,
the date of the most recent commit that was found in the
repository was 2025-08-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
MariaDB 11.8 5 March 2025 MARIADB-DUMPSLOW(1)
Pages that refer to this page: mariadb-dumpslow(1)
|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|