> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/clients-and-utilities/logging-tools/mariadb-dumpslow.md).

# mariadb-dumpslow

{% hint style="info" %}
Previously, the client was called `mysqldumpslow`. It can still be accessed under this name, via a symlink in Linux, or an alternate binary in Windows.
{% endhint %}

`mariadb-dumpslow` is a tool to examine the [slow query log](/docs/server/server-management/server-monitoring-logs/slow-query-log.md).

It parses the slow query log files, printing a summary result. 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.

## Usage

```bash
mariadb-dumpslow [ options... ] [ logs... ]
```

## Options

#### `-a`

Don't abstract all numbers to N and strings to 'S'.

#### `-d`, `--debug`

Debug mode.

#### ` -g`` `` `*`pattern`*

Grep: only consider statements that include this string *pattern*.

#### `--help`

Display help.

#### ` -h`` `` `*`hostname`*

*Hostname* of db server for -slow\.log filename (can be a wildcard). The Default is `''`, that is, match all hosts.

#### ` -i`` `` `*`name`*

Name of server instance (if using mysql.server startup script).

#### `-l`

Don't subtract lock time from total time.

#### `-j`, `--json`

Stores the dumped data in JSON format. Available from MariaDB 12.1.

#### ` -n`` `` `*`number`*

Abstract numbers with at least this *number* of digits within names.

#### `-r`

Reverse the sort order (largest last instead of first).

#### ` -s`` `` `*`order`*

What to sort by (`aa`, `ae`, `al`, `ar`, `at`, `a`, `c`, `e`, `l`, `r`, `t`). The default is `at` . The meaning of the abbreviations is:

* `aa` – average rows affected
* `ae` – aggregated number of rows examined
* `al` – average lock time
* `ar` – average rows sent
* `at` – average query time
* `a` – rows affected
* `c` – count
* `e` – rows examined
* `l` – lock time
* `r` – rows sent
* `t` – query time:

#### ` -t`` `` `*`number`*

Just show the top *number of queries*.

#### `-v`, `--verbose`

Verbose mode.

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

{% @marketo/form formId="4316" %}


---

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