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mysql> show variables like '%profiling%';
+------------------------+-------+
| Variable_name | Value |
+------------------------+-------+
| profiling | OFF |
| profiling_history_size | 15 |
+------------------------+-------+
2 rows in set (0.03 sec)
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profiling_history_size²ÎÊýֵΪ15±íʾ£¬¼Ç¼×î½ü15´ÎµÄ²éѯÀúÊ·¡£¸ÃÖµ¿ÉÒÔÐ޸ġ£
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mysql> set profiling=1;
Query OK, 0 rows affected (0.00 sec)
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mysql> show variables like '%profiling%';
+------------------------+-------+
| Variable_name | Value |
+------------------------+-------+
| profiling | ON |
| profiling_history_size | 15 |
+------------------------+-------+
2 rows in set (0.00 sec)
profilingֵΪON˵Ã÷ÒѾÆô¶¯¸Ã¹¦ÄÜ¡£
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| id | name |
+------+-----------+
| 22 | abc |
| 223 | dabc |
| 2232 | dddabc |
| 45 | asdsagd |
| 23 |
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