optimistic lock

If a large number of rollbacks caused by optimistic lock exceptions are occurring, it may be time to rethink your strategy.

如果乐观锁异常会引起大量的回滚，那么应该重新考虑您的策略。

Optimistic locking is an extremely efficient concurrency control method that guarantees data integrity without placing any physical lock in the database.

乐观锁是一个极其有效的并发性控制方法，它可以确保数据完整性而又无需在数据库中放置任何物理锁。

In this respect, it must be treated in some ways like an optimistic lock.

在此方面，它需要以乐观锁的方式进行处理。

Of course this also leads to the same issues such as questions about optimistic versus pessimistic locking, lock granularity, and the performance impact.

然而这也带来了和数据库事务同样的问题，比如乐观锁还是悲观锁，锁的粒度以及对性能的影响。

Speaking of Locking, Pratik said that JPA specification defaults to optimistic locking.

谈到锁（locking），Pratik说到JPA规范默认使用乐观锁（optimistic locking）。