mysqldumpslow - Summarize Slow Query Log Files

The MariaDB slow query log contains information about queries that take a long time to execute (see , "The Slow Query Log"). 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.

Table 4.12. mysqldumpslow Options

Format	Option File	Description	Introduction	Deprecated	Removed
-a		Do not abstract all numbers to N and strings to S
-n num		Abstract numbers with at least the specified digits
--debug	debug	Write debugging information
-g pattern		Only consider statements that match the pattern
--help		Display help message and exit
-h name		Host name of the server in the log file name
-i name		Name of the server instance
-l		Do not subtract lock time from total time
-r		Reverse the sort order
-s value		How to sort output
-t num		Display only first num queries
--verbose	verbose	Verbose mode

• --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, at: Sort by query time or average query time
  • l, al: Sort by lock time or average lock time
  • r, ar: Sort by rows sent or average rows sent
  • c: Sort by count

  By default, mysqldumpslow sorts by average query time (equivalent to -s at).

• -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:

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