mysqldumpslow使用说明
mysqldumpslow --help
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 （出现次数）
l: lock time
r: rows sent
t: query time
-r reverse the sort order (largest last instead of first) （从大到小排序）
-t NUM just show the top n queries （最高的n个查询）
-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
例如：
分析出使用频率最高的前N条慢sql：
mysqldumpslow -s c -t N mysql-slow.log
如只需分析处理速度最慢的N条sql：
mysqldumpslow -t N mysql-slow.log