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

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

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