mysql> show variables like 'slow_query%';
+---------------------+-----------------------------------------------+
| Variable_name | Value |
+---------------------+-----------------------------------------------+
| slow_query_log | OFF |
| slow_query_log_file | /usr/local/mysql/data/tango-GDB-DB01-slow.log |
+---------------------+-----------------------------------------------+
2 rows in set (0.11 sec)
mysql> show variables like 'long%';
+-----------------+-----------+
| Variable_name | Value |
+-----------------+-----------+
| long_query_time | 10.000000 |
+-----------------+-----------+
1 row in set (0.00 sec)
#开启slow query并设置阈值为100ms
mysql> set global slow_query_log=1;
Query OK, 0 rows affected (0.10 sec)
mysql> set long_query_time=0.1;
Query OK, 0 rows affected (0.00 sec)
mysql> show variables like 'slow_query%';
+---------------------+-----------------------------------------------+
| Variable_name | Value |
+---------------------+-----------------------------------------------+
| slow_query_log | ON |
| slow_query_log_file | /usr/local/mysql/data/tango-GDB-DB01-slow.log |
+---------------------+-----------------------------------------------+
2 rows in set (0.00 sec)
mysql> show variables like 'long%';
+-----------------+----------+
| Variable_name | Value |
+-----------------+----------+
| long_query_time | 0.100000 |
+-----------------+----------+
1 row in set (0.00 sec)
