mysqldumpslow
Summarize slow query log files
Synopsis
mysqldumpslow [options]
[log_file ...]
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description
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
• 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
copyright
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mysqldumpslow [options]
[
log_file ...]
see also
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/.
author
Oracle
Corporation (http://dev.mysql.com/).