该--lock-tables=false选项有效吗？

根据手册页，如果要转储InnoDB表，则可以使用以下--single- transaction选项：

--lock-tables, -l

Lock all tables before dumping them. The tables are locked with READ
LOCAL to allow concurrent inserts in the case of MyISAM tables. For
transactional tables such as InnoDB and BDB, --single-transaction is
a much better option, because it does not need to lock the tables at
all.

对于 innodb DB ：

mysqldump --single-transaction=TRUE -u username -p DB