我的MySQL奴隶花了很多时间在Slave_SQL_Running_State: System lock
。我可以看到该系统当前处于I / O写绑定状态,并且正在处理日志,尽管速度很慢。Show processlist
处于此状态时,除了“正在等待主机发送事件”和“系统锁定”外,不会显示其他任何内容。
我的所有表(系统表除外)都是InnoDB,并且禁用了外部锁定。在这种状态下,奴隶在做什么?
这是一些要求的信息:
首先,这是Amazon EC2实例上的MySQL 5.6社区,所有存储都位于EBS上。
mysql> show processlist;
+----+-------------+-----------+---------------+---------+--------+----------------------------------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+-------------+-----------+---------------+---------+--------+----------------------------------+------------------+
| 1 | system user | | NULL | Connect | 26115 | Waiting for master to send event | NULL |
| 2 | system user | | NULL | Connect | 402264 | System lock | NULL |
| 14 | readonly | localhost | theshadestore | Query | 0 | init | show processlist |
+----+-------------+-----------+---------------+---------+--------+----------------------------------+------------------+
3 rows in set (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 184.106.16.14
Master_User: replicant
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: bin-log.000764
Read_Master_Log_Pos: 505452667
Relay_Log_File: relay-log.000197
Relay_Log_Pos: 345413863
Relay_Master_Log_File: bin-log.000746
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 345413702
Relay_Log_Space: 19834085375
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 402263
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 307009
Master_UUID: b1bf9a19-dac0-11e2-8ffa-b8ca3a5bce90
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: System lock
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
mysqld.log
时,复制在第一时间爆出与后输出从下面的:mysql> SHOW SLAVE STATUS \ G; mysql>显示完整的程序清单;