MySQL慢查询 ------ 开启慢查询
mysql> show variables like 'slow_query%';+---------------------------+----------------------------------+
| Variable_name | Value |
+---------------------------+----------------------------------+
| slow_query_log | OFF |
| slow_query_log_file | /mysql/data/localhost-slow.log |
+---------------------------+----------------------------------+
mysql> show variables like 'long_query_time';
+-----------------+-----------+
| Variable_name | Value |
+-----------------+-----------+
| long_query_time | 10.000000 |
+-----------------+-----------+
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