从字面意思看了一下是因为slave_pending_jobs_size_max默认值为16777216(16MB),但是slave接收到的slave_pending_jobs_size_max为17085453(17M);
解决方案
从库执行如下SQL
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mysql>stop slave; mysql> set global slave_pending_jobs_size_max=20000000; mysql> start slave; |
#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
故障模拟:
从库设置
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mysql> set global slave_parallel_workers=4; mysql> show variables like 'slave_parallel_workers' ; + ------------------------+-------+ | Variable_name | Value | + ------------------------+-------+ |slave_parallel_workers | 4 | + ------------------------+-------+ 1 row in set (0.00sec) mysql> set global slave_pending_jobs_size_max=1024; mysql> show variables like 'slave_pend%' ; + -----------------------------+-------+ | Variable_name | Value | + -----------------------------+-------+ |slave_pending_jobs_size_max | 1024 | + -----------------------------+-------+ 1 row in set (0.00sec) |
主库操作:
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mysql> update erp_mkpf set usnam= '测试1864错误' ; ERROR 1197 (HY000):Multi-statement transaction required more than 'max_binlog_cache_size' bytes ofstorage; increase this mysqld variable and try again mysql> set global max_binlog_cache_size=8388608000000; Query OK, 0 rowsaffected (0.00 sec) mysql> begin ; Query OK, 0 rowsaffected (0.00 sec) mysql> update erp_mkpf set usnam= '测试1864错误' ; Query OK, 70466 rowsaffected (0.38 sec) Rows matched:70466 Changed: 70466 Warnings: 0 mysql> commit ; Query OK, 0 rowsaffected (0.08 sec) |
从库查看状态:
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mysql> show slavestatus\G Last_SQL_Errno: 1864 Last_SQL_Error: Cannot scheduleevent Update_rows, relay-log name ./HE1-relay-bin.000005, position 494 toWorker thread because its size 8200 exceeds 1024 ofslave_pending_jobs_size_max. |
以上所述是小编给大家介绍的Mysql 1864 主从错误解决方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://suifu.blog.51cto.com/9167728/1841764