使用mysql自带的工具profiling

1.查看是否打开
mysql> show variables like '%pro%';
+---------------------------+-------+
| Variable_name             | Value |
+---------------------------+-------+
| have_profiling            | YES   |
| profiling                 | OFF   |
| profiling_history_size    | 15    |
| protocol_version          | 10    |
| proxy_user                |       |
| slave_compressed_protocol | OFF   |
| stored_program_cache      | 256   |
+---------------------------+-------+
7 rows in set (0.00 sec)

2.默认是关闭的
打开它
set profiling=1;

3.使用
 select * from corp_base_par where res_date=330000 limit 1;

mysql> show profiles;
+----------+------------+-----------------------------------------------------------+
| Query_ID | Duration   | Query                                                     |
+----------+------------+-----------------------------------------------------------+
|        1 | 0.00008975 | set  profiling=1                                          |
|        2 | 0.00088450 | select * from corp_base_par where res_date=330000 limit 1 |
+----------+------------+-----------------------------------------------------------+
2 rows in set (0.00 sec)

显示了 这条sql的具体消耗时间