4.6.9. mysqldumpslow — Summarize Slow Query Log Files

The MySQL slow query log contains information about queries that take a long time to execute (see Section 5.2.5, "The Slow Query Log"). mysqldumpslow parses MySQL 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 4.15. mysqldumpslow Options

Format	Option File	Description
-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 MySQL 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:

shell> mysqldumpslowReading mysql slow query log from /usr/local/mysql/data/mysqld51-apple-slow.logCount: 1  Time=4.32s (4s)  Lock=0.00s (0s)  Rows=0.0 (0), root[root]@localhost insert into t2 select * from t1Count: 3  Time=2.53s (7s)  Lock=0.00s (0s)  Rows=0.0 (0), root[root]@localhost insert into t2 select * from t1 limit NCount: 3  Time=2.13s (6s)  Lock=0.00s (0s)  Rows=0.0 (0), root[root]@localhost insert into t1 select * from t1