mysql qps计算？
mysql> show global status like 'Qcache_hits';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Qcache_hits | 0 |
+---------------+-------+
1 row in set (0.03 sec)
mysql> show global status like 'Com_select';
+---------------+--------+
| Variable_name | Value |
+---------------+--------+
| Com_select | 484370 |
+---------------+--------+
1 row in set (0.05 sec)
mysql> show global status like 'Com_insert';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Com_insert | 24397 |
+---------------+-------+
1 row in set (0.04 sec)
mysql> show global status like 'Com_delete';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Com_delete | 7995 |
+---------------+-------+
1 row in set (0.03 sec)
mysql> show global status like 'Com_update';
+---------------+--------+
| Variable_name | Value |
+---------------+--------+
| Com_update | 747809 |
+---------------+--------+
1 row in set (0.03 sec)
mysql> show global status like 'Com_replace';
+---------------+------
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