Updating catalog statistics, which emphasizes the importance of collecting and maintaining up-to-date database statistics, the lack of which is often the source of many of the performance problems.

更新目录统计信息，这部分强调收集和维护最新数据库统计信息的重要性，缺少这项工作常常是导致许多性能问题的源头所在。

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Instead we opt to design for the lack of transactions and build in failure modes that allow the client to succeed even in the event of database availability issues.

相反，我们选择缺少事务的设计，并加入失效模式，失效模式可以使客户端甚至在发生数据库可用性问题的时候也能继续进行。

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Now for the other big difference between the ZODB and a relational database: ZODB objects completely lack any schema specification.

下面讨论一下ZODB和关系数据库之间的其他主要区别：ZODB对象完全缺乏任何模式规范。

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Unfortunately, the lack of a comprehensive database of different types of speech patterns stands in the way of wider implementation.

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The breakdowns observed included (1) the lack of an audit trail in the COMPASS database and the ability for the arrestees to manipulate worksheet items in COMPASS, (2) the failure to perform periodic contractor cost audits (3) the quality of the Trenching Manual, (4) the lack of a formal employee rotation policy, and (5) the failure to coordinate follow through on reported allegations.

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Companies like Kantar, IPSOS and GfK, who do not own significant high-margin database or currency products, are subject to pricing pressures that result from a lack of differentiation and newer marketplace tools.

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