Смотрим расширенную статистику сервера.

$ mysqladmin -u root -p extended-status

+-----------------------------------+-----------+
| Variable_name                     | Value     |
+-----------------------------------+-----------+
| Aborted_clients                   | 10        |
| Aborted_connects                  | 6         |
| Binlog_cache_disk_use             | 0         |
| Binlog_cache_use                  | 0         |
| Bytes_received                    | 65009057  |
| Bytes_sent                        | 227852405 |
...