mysql open slow query record

1. my.cnf
3. [mysqlld]  
4. long_query_time=2  
5.   
6. #5.0, 5.1 and other versions configure the following options  
7. log-slow-queries="mysql_slow_query.log"  
8. #5.5 and above configure the following options  
9. slow-query-log=On  
10. slow_query_log_file="mysql_slow_query.log"  
11.   
12. log-query-not-using-indexes