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)