From library has no problem before, today the upgrade, after the restart found master-slave synchronization delay and Seconds_Behind_Master is more and more big, is not very understand, before the resumption of master-slave synchronization, at least how to configure high delay instead of more serious, and sometimes Slave_SQL_Running_State the parameters is the lock, the System is updating, sometimes also can not find what is the problem, have a great god answers, do have to turn from the library during configuration, but are innodb_read_io_threads, innodb_buffer_pool_size these parameters