**MARIADB-DUMPSLOW**(1) MariaDB Database System **MARIADB-DUMPSLOW**(1)

# [NAME](#NAME)

mariadb-dumpslow - Summarize slow query log files (mariadb-dumpslow is now a symlink to mariadb-dumpslow)

# [SYNOPSIS](#SYNOPSIS)

**mariadb-dumpslow \[options] \[log\_file ...]**

# [DESCRIPTION](#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)

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](#SEE_ALSO)

For more information, please refer to the MariaDB Documentation, available online at https://mariadb.com/docs/

# [AUTHOR](#AUTHOR)

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

5 March 2025 MariaDB 11.8

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Document: mysqldumpslow(1) from mariadb-12.2 12.2.2-r2 (Chainguard OS)
Source: https://github.com/MariaDB/server.git