extents
英 [ɪksˈtɛnts]
美 [ɪkˈstɛnts]
n. 程度; 限度; 大小; 面积; 范围
extent的复数
双语例句
- For maximum efficiency, frequently accessed tables should have as few extents as possible.
为达到效率最大化，频繁访问的表区段应当越少越好。 - When using linear logging on the other hand log file extents will be continually allocated as required.
另一方面，使用线性日志记录时，将根据需要继续分配日志文件扩展。 - Given this behaviour ensure that there are a reasonable number of secondary extents.
此行为可确保有合理数量的次扩展。 - Although you can allocate additional extents, the blocks themselves are allocated separately.
尽管你可以进行额外的扩展，但是块本身是被隔开分派的。 - This feature checks the consistency and the corruption on data and extents, which is currently done through the oncheck utility.
这个特性检查数据和区段的一致性和损坏，当前这是通过oncheck实用程序完成的。 - Log file extents can be specified as primary or secondary.
日志文件扩展可以指定为主扩展或次扩展。 - Extents are a collection of eight physically contiguous pages and are used to efficiently manage the pages.
区是八个物理上连续的页的集合，用来有效地管理页。 - Behind the scenes, the LVM system allocates storage in equal-sized "chunks", called extents.
在幕后，LVM系统以大小相等的“块”（称为“范围”）为单位分配存储量。 - The second problem, of course, is that a table or an index with many highly active extents will suffer from performance degradation due to increased disk head movement and increased contention for head positioning with other objects in the database.
当然，第二个问题是，有很多高度活跃的盘区的一个表或索引将遭遇性能降低，因为磁头移动的增加和磁头与数据库中其他对象的位置争用的增加。 - The following illustration shows the sequence of pages used by the database engine to allocate and manage extents.
下图显示了数据库引擎用来分配和管理区的页顺序。