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GNU/Linux |
Debian 6.0.2(Squeeze) |
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mysqldumpslow(1) |
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mysqldumpslow − Summarize slow query log files
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mysqldumpslow [options] [log_file ...] |
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.
• −−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
• s, as: 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
Copyright © 1997, 2010, Oracle and/or its affiliates. All rights reserved.
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
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/.
Oracle Corporation (http://dev.mysql.com/).
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mysqldumpslow(1) | |