MySQL Show Status 功能的深层应用与局限性揭秘？

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| Variable_name                   | Value                                             |
+++
| Aborted_clients                 | 0                                                  |
| Aborted_connects                | 0                                                  |
| Appearance                      | Default                                            |
| Binlog_cache_size               | 32768                                              |
| Binlog_format                   | ROW                                                |
| Binlog_row_image                | FULL                                               |
| Binlog_checksum                 | None                                               |
| Connect_Retry                   | 10                                                 |
| Connect_timeout                 | 10                                                 |
| Connection_timeout              | 10                                                 |
| Unix_socket                     | /tmp/mysql.sock                                    |
| Unix_socket_permission          | 666                                                |
| Charset                         | utf8mb4                                            |
| Collation                       | utf8mb4_unicode_ci                                 |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Character_set_client            | utf8mb4                                            |
| Character_set_connection        | utf8mb4                                            |
| Character_set_database          | utf8mb4                                            |
| Character_set_filesystem        | binary                                             |
| Character_set_results           | utf8mb4                                            |
| Character_set_system            | utf8                                               |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci                                    |
| Collation_connection            | utf8mb4_unicode_ci                                 |
| Collation_server                | utf8mb4_unicode_ci                                 |
| Collation_database              | utf8mb4_unicode_ci                                 |
| Collation_file                  | utf8_general_ci