mysqldumpslow man page
mysqldumpslow — Summarize slow query log files
mysqldumpslow [options] [log_file ...]
The MySQL slow query log contains information about queries that take a long time to execute (see Section 6.4.5, “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.
Display a help message and exit.
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).
Do not subtract lock time from total time.
· -n N
Abstract numbers with at least N digits within names.
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> mysqldumpslow Reading mysql 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
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For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.
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