mysqldumpslow - Summarize slow query log files
The MySQL slow query log contains information about queries that take a long
time to execute (see Section 5.4.5, “The Slow Query
parses MySQL slow query log files and
prints a summary of their contents.
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
options can be used to modify value
shell> mysqldumpslow [options] [log_file ...]
supports the following options.
Display a help message and exit.
Do not abstract all numbers to N and strings to 'S'.
Run in debug mode.
Consider only queries that match the ( grep
Host name of MySQL server for *-slow.log file name. The value can contain a
wildcard. The default is * (match all).
Name of server instance (if using mysql.server
Do not subtract lock time from total time.
Abstract numbers with at least N
digits within names.
Reverse the sort order.
How to sort the output. The value of sort_type
should be chosen from the
•t, at: Sort by query time or average query
•l, al: Sort by lock time or average lock
•r, ar: Sort by rows sent or average rows
•c: Sort by count
By default, mysqldumpslow
sorts by average query time (equivalent to
Display only the first N
queries in the output.
Verbose mode. Print more information about what the program does.
Example of usage:
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
Oracle Corporation (http://dev.mysql.com/).