Mysql 1864 主从错误解决方法

故障描述：

在mysql 主库上增加了一个主键操作，没过5分钟就接受到zabbix报警mysql主从同步异常停止信息，一首凉凉送给自己。。。。

查看现在主从状态

(root@192.168.1.2) [(none)]> show slave status\G

             Slave_IO_Running: Yes

            Slave_SQL_Running: No

              Replicate_Do_DB:

          Replicate_Ignore_DB:

           Replicate_Do_Table:

       Replicate_Ignore_Table:

      Replicate_Wild_Do_Table:

  Replicate_Wild_Ignore_Table:

                   Last_Errno:

                   Last_Error: Cannot schedule event Update_rows, relay-log name ./log-relaynew., position  to Worker thread because its size  exceeds  of slave_pending_jobs_size_max.

#从last_sql_error 错误信息，可以看出是因为slave_pending_jobs_size_max 值引起的，默认值16777216，但是接收到的是16777713，所以导致主从同步停止。

处理步骤如下：

1、查看主库max_allowed_packet的大小

(root@192.168.1.1) [(none)]> show variables like 'max_allowed_packet';

+--------------------+----------+

| Variable_name      | Value    |

+--------------------+----------+

| max_allowed_packet |  |

+--------------------+----------+

 row in set (0.00 sec)

2、设置从库slave_pending_jobs_size_max的大小，注意，需要大于主库max_allowed_packet的大小

(root@192.168.1.2) [(none)]> stop slave;

Query OK, 0 rows affected (0.00 sec)

(root@192.168.1.2) [(none)]> set global slave_pending_jobs_size_max=52428800;

Query OK,  rows affected,  warning (0.00 sec)

(root@192.168.1.2) [(none)]> start slave;

Query OK, 0 rows affected (0.01 sec)

3、查看主从同步状态

(root@192.168.1.2) [(none)]> show slave status\G

*************************** . row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.1.1

                  Master_User: repl

                  Master_Port:

                Connect_Retry:

              Master_Log_File: log-bin.

          Read_Master_Log_Pos:

               Relay_Log_File: log-relaynew.

                Relay_Log_Pos:

        Relay_Master_Log_File: log-bin.

             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:

                   Last_Error:

                 Skip_Counter:

          Exec_Master_Log_Pos:

              Relay_Log_Space:

              Until_Condition: None

               Until_Log_File:

                Until_Log_Pos:

           Master_SSL_Allowed: No

           Master_SSL_CA_File:

           Master_SSL_CA_Path:

              Master_SSL_Cert:

            Master_SSL_Cipher:

               Master_SSL_Key:

        Seconds_Behind_Master:

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno:

                Last_IO_Error:

               Last_SQL_Errno:

               Last_SQL_Error:

  Replicate_Ignore_Server_Ids:

             Master_Server_Id:

                  Master_UUID: 872aba0b-b543-11e6-9ce1-0cc47a581d8c

             Master_Info_File: mysql.slave_master_info

                    SQL_Delay:

          SQL_Remaining_Delay: NULL

      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

           Master_Retry_Count:

                  Master_Bind:

      Last_IO_Error_Timestamp:

     Last_SQL_Error_Timestamp:

               Master_SSL_Crl:

           Master_SSL_Crlpath:

           Retrieved_Gtid_Set: 872aba0b-b543-11e6-9ce1-0cc47a581d8c:-

            Executed_Gtid_Set: 1bf68f85-ef7c-11e8-bad9-0cc47abcef86:-,

872aba0b-b543-11e6-9ce1-0cc47a581d8c:-

                Auto_Position:

         Replicate_Rewrite_DB:

                 Channel_Name:

           Master_TLS_Version:

 row in set (0.00 sec)

搞定！！

Tips:

巴特西

Mysql 1864 主从错误解决方法

slave_pending_jobs_size_max的用途：

在多线程复制时，在队列中Pending的事件所占用的最大内存，默认为16M，如果内存富余，或者延迟较大时，可以适当调大;注意这个值要比主库的max_allowed_packet大！

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