mysqldumpslow

1. -s 依据什么排序
   al  average lock time
   ar  average rows sent
   at  average query time
   c  count
   l  lock time
   r rows sent
   t query time
   
   
   
2. -t show top N queries
   
   
   
3. -g grep: only consider stmts that include this string
   
   

Examples:

1. 得到返回记录集最多的10个SQL
   

   mysqldumpslow -s r -t 10 hostname-slow.log

    

2. 得到访问次数最多的10个SQL
   

   mysqldumpslow -s c -t 10 hostname-slow.log

    

3. 按时间排序的前10SQL中含有'left join'的
   

   mysqldumpslow  -s t -t 10 -g 'left join' hostname-slow.log