MySQL SQL Tuning：Profile定位单条QUERY性能瓶颈(二)
result | 2.838465 |
| Sending data | 0.928078 |
| starting | 0.000160 |
| statistics | 0.000145 |
| preparing | 0.000118 |
| Opening tables | 0.000055 |
| init | 0.000050 |
| System lock | 0.000033 |
| end | 0.000026 |
| optimizing | 0.000026 |
| checking permissions | 0.000026 |
| closing tables | 0.000021 |
| logging slow query | 0.000014 |
| query end | 0.000011 |
| executing | 0.000011 |
| cleaning up | 0.000005 |
+----------------------+----------+
17 rows in set (0.00 sec)