mysql慢查日志分析工具：自带的mysqldumpslow
root@ubuntu:~# mysqldumpslow -h
Option h requires an argument
ERROR: bad option
Usage: mysqldumpslow [ OPTS... ] [ LOGS... ]
Parse and summarize the MySQL slow query log. Options are
--verbose verbose
--debug debug
--help write this text to standard output
-v verbose
-d debug
-s ORDER what to sort by (al, at, ar, c, l, r, t), 'at' is default
al: average lock time
ar: average rows sent
at: average query time
c: count
l: lock time
r: rows sent
t: query time
-r reverse the sort order (largest last instead of first)
-t NUM just show the top n queries
-a don't abstract all numbers to N and strings to 'S'
-n NUM abstract numbers with at least n digits within names
-g PATTERN grep: only consider stmts that include this string
-h HOSTNAME hostname of db server for *-slow.log filename (can be wildcard),
default is '*', i.e. match all
-i NAME name of server instance (if using mysql.server startup script)
-l don't subtract lock time from total time
root@ubuntu:~# mysqldumpslow -t 6 /var/lib/mysql/mysql_slow_20170829.log
Reading mysql slow query log from /var/lib/mysql/mysql_slow_20170829.log
Count: 3 Time=0.00s (0s) Lock=0.00s (0s) Rows=1.7 (5), root[root]@localhost
show variables like 'S'
Count: 3 Time=0.00s (0s) Lock=0.00s (0s) Rows=1.7 (5), root[root]@localhost
select * from store limit N
Count: 1 Time=0.00s (0s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost
select @@version_comment limit N
Count: 1 Time=0.00s (0s) Lock=0.00s (0s) Rows=0.0 (0), root[root]@localhost
set global slow_query_log_file='S'
Count: 2 Time=0.00s (0s) Lock=0.00s (0s) Rows=7.0 (14), root[root]@localhost
show databases
Count: 1 Time=0.00s (0s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost
SELECT DATABASE()
root@ubuntu:~#