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low select * from tb_slow
Count: 1 Time=0.20s (0s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost
select count(*) from tb_slow
Count: 1 Time=1.57s (1s) Lock=0.00s (0s) Rows=83.0 (83), root[root]@localhost
select table_schema,table_name,count(*) from tb_slow
group by table_schema,table_name order by N,N
#以下是按照最大耗用时间排最后，只显示2条的方式格式化日志文件
suse11b:~ # mysqldumpslow -r -t 2 /var/lib/mysql/suse11b-slow.log
Reading mysql slow query log from /var/lib/mysql/suse11b-slow.log
Count: 1 Time=1.57s (1s) Lock=0.00s (0s) Rows=83.0 (83), root[root]@localhost
select table_schema,table_name,count(*) from tb_slow
group by table_schema,table_name order by N,N
Count: 4 Time=16.87s (67s) Lock=0.00s (0s) Rows=0.0 (0), root[root]@localhost
insert into tb_slow select * from tb_slow
#获取mysqldumpslow的帮助信息
suse11b:~ # 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 #query的次数
l: lock time
r: rows sent #返回的记录数
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
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