# t=time, l=lock time, r=rows # at, al, 以及 ar 是对应的平均值
mysqldumpslow 可以接受的参数有：
'v+', # verbose 'd+', # debug 's=s', # 排序 (t, at, l, al, r, ar etc) 'r!', # 倒排序 (largest last instead of first) 't=i', # 显示最高的 n 个查询 'a!', # 不把所有的数字以 N ，字符串以 'S' 显示 'n=i', # abstract numbers with at least n digits within names 'g=s', # grep: only consider stmts that include this string 'h=s', # hostname of db server for *-slow.log filename (can be wildcard) 'i=s', # name of server instance (if using mysql.server startup script) 'l!', # don't subtract lock time from total time
