MySQL查看运行时间

1、查看MySQL运行多长时间

mysql> SHOW GLOBAL STATUS LIKE 'UPTIME';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Uptime        | 12823 |
+---------------+-------+
1 row in set (0.00 sec)

2、查看MySQL连接超时

mysql> SHOW GLOBAL VARIABLES LIKE '%TIMEOUT';
+-----------------------------+----------+
| Variable_name               | Value    |
+-----------------------------+----------+
| connect_timeout             | 10       |
| delayed_insert_timeout      | 300      |
| innodb_flush_log_at_timeout | 1        |
| innodb_lock_wait_timeout    | 50       |
| innodb_rollback_on_timeout  | OFF      |
| interactive_timeout         | 28800    |
| lock_wait_timeout           | 31536000 |
| net_read_timeout            | 30       |
| net_write_timeout           | 60       |
| rpl_stop_slave_timeout      | 31536000 |
| slave_net_timeout           | 3600     |
| wait_timeout                | 28800    |
+-----------------------------+----------+
12 rows in set (0.00 sec)

3、查看mysql请求链接进程被主动杀死 

mysql> SHOW GLOBAL STATUS LIKE 'COM_KILL';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Com_kill      | 0     |
+---------------+-------+
1 row in set (0.00 sec)

4、查看MySQL通信信息包最大值

mysql> SHOW GLOBAL VARIABLES LIKE 'MAX_ALLOWED_PACKET';
+--------------------+---------+
| Variable_name      | Value   |
+--------------------+---------+
| max_allowed_packet | 4194304 |
+--------------------+---------+
1 row in set (0.00 sec)