Summarize slow query log files
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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
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
mysqldumpslow like this:
supports the following options.
Display a help
message and exit.
Do not abstract
all numbers to N and strings to 'S'.
Run in debug
queries that match the (grep-style)
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 startup script).
Do not subtract
lock time from total time.
numbers with at least N digits within names.
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
mysqldumpslow sorts by average query time (equivalent
to -s at).
the first N queries in the output.
Print more information about what the program does.
Reading mysql slow query log from
Count: 1 Time=4.32s (4s) Lock=0.00s (0s) Rows=0.0 (0),
insert into t2 select * from t1
Count: 3 Time=2.53s (7s) Lock=0.00s (0s) Rows=0.0 (0),
insert into t2 select * from t1 limit N
Count: 3 Time=2.13s (6s) Lock=0.00s (0s) Rows=0.0 (0),
insert into t1 select * from t1
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