DB2 V9.5 的乐观锁定特性最小化了给定资源对于其他事务的不可用时间，进一步改善了可伸缩性。
Optimistic locking in DB2 9.5 improves scalability by minimizing the time for which a given resource is unavailable for use by other transactions.
例如，IT服务提供商需要计算在服务不可用时间段内所遭受的商业损失。
For example, IT service providers need to calculate business losses when their infrastructures are unavailable.
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